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A 19th-century American system · Richmond, 1893, and Camp, 1992

Cardology

Playing-card birth cards, from Olney H. Richmond's Mystic Test Book of 1893

Every birthday has one of the 52 playing cards; yours, and the deal of the pack, give you a place in the spread and a path through it.

Your Cardology reading, $4.99. Includes this system's raw data. Written for you by AI. Read a sample. Charts and the written text are free in every account.

Your birth card in Cardology is set by your birthday alone: 19 January gives the Eight of Diamonds, in the crown line of the Life Spread, and from that place the chart draws your life path, your ruling and karma cards and your current year in seven periods of 52 days.

The arithmetic and the spreads are Olney H. Richmond's, from The Mystic Test Book of 1893; the readings of the cards as character follow the modern line of Randall and Campbell (1947) and Robert Lee Camp (1992 onward).

Birth card · 19 January

55 − (2 × 1 + 19) = 34

Eight of Diamonds Crown line, Jupiter column “Drive, capability and a sense of worth.”

Ruling card
Capricorn, ruled by Saturn: Ten of Spades
Karma cards
Gives to the Queen of Spades; receives from the Seven of Clubs

Life path · the card before it and the ten after

  1. Moon · Ten of Clubs
  2. Mercury · King of Spades
  3. Venus · Three of Hearts
  4. Mars · Ace of Clubs
  5. Jupiter · Queen of Clubs
  6. Saturn · Ten of Spades
  7. Uranus · Five of Clubs
  8. Neptune · Three of Diamonds
  9. Pluto · Ace of Spades
  10. Result · Seven of Hearts
  11. Cosmic Lesson · Seven of Diamonds

The year from the birthday in 2026 · age 37

Long Range: Queen of Diamonds · Pluto: Ace of Diamonds · Result: Eight of Clubs · Environment: Six of Clubs · Displacement: Nine of Clubs

  1. Mercury · 19 Jan 2026 Three of Clubs
  2. Venus · 12 Mar 2026 Ace of Clubs
  3. Mars · 3 May 2026 Five of Diamonds
  4. Jupiter · 24 Jun 2026 Five of Clubs
  5. Saturn · 15 Aug 2026 Jack of Diamonds
  6. Uranus · 6 Oct 2026 Three of Spades
  7. Neptune · 27 Nov 2026 Two of Clubs

The tradition's reading of this period, not a prediction of events, and not advice on health, money, legal matters or relationships.

Figure 1. The cards of a fictional person born on 19 January 1989 at 19:17 in Michigan. Their birth card, the Eight of Diamonds, sits in the crown line of the Life Spread, drawn here with the eleven cards of their life path outlined; below it the ruling and karma cards, and the cards of their year from the birthday in 2026, in seven periods of 52 days. Method: Olney H. Richmond's quadration and layout (The Mystic Test Book, 1893) for the spreads; the life path, ruling, karma and yearly cards by the conventions Robert Lee Camp popularised. Card faces drawn by EsoTerrier.
On this page
  1. How it works
  2. Origins and history
  3. The 53 cards
  4. Variants and what we leave out
  5. Myths and disputed claims
  6. Stories and lore
  7. Evidence and criticism
  8. Terms
  9. Sample reading
  10. Sources

How it works

The birth card. Every card of the pack has a solar value, Richmond's number for it: the Ace to King of Hearts are 1 to 13, the Clubs 14 to 26, the Diamonds 27 to 39 and the Spades 40 to 52. Your birth card is the card whose solar value is 55 minus twice the month and minus the day. For the person in Figure 1, born on 19 January, that is 55 − (2 × 1 + 19) = 34, the Eight of Diamonds. 31 December gives 0, the Joker, and 29 February gives 22, the Nine of Clubs. Richmond's own example, 23 July, gives 18, the Five of Clubs.

The formula is Richmond's, restated. His book finds the day card another way: add the “astral power” of the month to that of the day and take the “spirit” of the sum, which points to a cell of the plate of day cards on page 63 (Figure 2). Run from the 1893 scan for all 366 days, his rule and the formula give the same card on every one, once a single digit of his printed table, in the entry for the 9th of the month, is read as 5 rather than 4. Because the formula depends only on the month and the day, a card has the same birthdays every year: between one and twelve of them.

A printed table of small playing cards in six numbered columns and nine numbered rows, 0 to 8: the first column holds two stars, a large letter J and the Hearts from the ace upwards, the other columns the rest of the pack in order, Clubs, Diamonds and Spades, with the Ace of Spades drawn as an emblem.
Figure 2. The plate of day cards in the first edition of The Mystic Test Book (Chicago, 1893), page 63. Richmond's rule adds the astral powers of the month and the day and takes the spirit of the sum, which points to a cell here; the crowned J in the corner is the Jester's cell, the card of 31 December. The rule gives the same card as our formula on all 366 days. 1893. Library of Congress, via the Internet Archive, Public Domain Mark 1.0.

The spreads. Richmond deals the pack by a fixed rule he calls quadration. Face down in natural order, Ace of Hearts on top, the pack is dealt in blocks of three “without disturbing the order in which they come” to four quarters, Hearts, Clubs, Diamonds and Spades, until four cards remain, which are dealt singly; the quarters are gathered up, Clubs onto Hearts, then Diamonds, then Spades; the pack is dealt again one card at a time round the four quarters and gathered the same way. One such pass is a quadrate. The first quadrate of the natural order is the Life Spread, the spread every birth card is read from.

Repeat it and the cards keep moving, but not forever. Richmond saw that “90 quadrates” bring “every emblem in its original solar place”, and the arithmetic agrees: the rule is a fixed shuffle that returns the pack to its natural order on the ninetieth pass and not before. Along the way three cards never move at all, the Jack of Hearts, the Eight of Clubs and the King of Spades; two pairs, the Ace of Clubs with the Two of Hearts and the Seven of Diamonds with the Nine of Hearts, swap places at every pass; and the other 45 cards travel one cycle of 45 steps. Our engine checks all of this each time it starts.

The layout. Richmond lays a spread out in seven rows of seven, one row for each planet, from the right-hand end of the table, and three “sun cards” above them. His 1893 text does not say which planet's row is on top; his engraving of 1896 (Figure 3) and Camp's published chart both put Mercury at the top and Neptune at the foot, and so do we. Each row is read from right to left, so the columns run Neptune to Mercury across the page, and the three crown cards sit over the Mars, Jupiter and Saturn columns. A card's place is its row and its column: the Ace of Clubs, for example, is in the Mercury row and the Venus column, and a card whose row and column share a planet is called double.

A book page with an engraving of playing cards laid out in seven rows on a starry black ground, each row beginning with a small picture of a planet labelled Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune from top to bottom, three more cards above the middle of the top row, and down the sides the words Side of the Sitter and Side of the Delineator. Lines of text above and below the engraving.
Figure 3. Richmond's own engraving of a grand spread, from the Supplement to The Mystic Test Book (Chicago, 1896), page 257: seven rows of seven cards, one row for each planet from Mercury at the top to Neptune at the foot, the three “sun cards” above, the sitter on the left and the reader, “the delineator”, on the right. The text around it is his answer to readers who asked which of his meanings is the right one: “cast-iron rules” cannot be given. 1896. Library of Congress, via the Internet Archive, Public Domain Mark 1.0.

What is read from the Life Spread. Everything else is the modern line's, computed by us from Camp's documented rules; methods are not anyone's property, and his wording and card names are never used.

  • The life path. The card before yours in the Life Spread is your Moon card; the seven after it are your Mercury to Neptune cards, and the next three your Pluto, Result and Cosmic Lesson cards. Reading order runs on from the crown back to the top right, so every card has a path.
  • The planetary ruling card. The card of your life path in the place of your Sun sign's ruling planet, with the modern rulers the tradition uses: Aries Mars, Taurus and Libra Venus, Gemini and Virgo Mercury, Cancer the Moon card, Leo the birth card itself, Scorpio both Mars and Pluto, Sagittarius Jupiter, Capricorn Saturn, Aquarius Uranus, Pisces Neptune. We take the Sun's sign from an ephemeris. With a birth time it is exact; without one, if the Sun changed sign during the birth day, you are given both signs' cards, which is the tradition's own answer.
  • The karma cards. The natural-order card that sits in your Life Spread place, and the Life Spread card that sits in your natural place. The semi-fixed cards are each other's, both ways; the fixed cards have none.
  • The years. Age 0 is read from the Life Spread, age 1 from the next quadrate, and so on: age 89 uses the natural order, and age 90 the Life Spread again. From each year's spread come the seven period cards, a Pluto and a Result card, a Long Range card for the year as a whole (from a spread for each block of seven years), and an Environment and a Displacement card for every card outside the Family of Seven.
  • The periods. The year from one birthday to the next is cut into seven periods of 52 days, Mercury to Neptune, with the birthday as the first day of Mercury, as in Camp's instructions; other schools start a day later. The periods are the tradition's themes for the year, never a timing for anything.
  • The card of the day. Richmond's rule: “Day cards and birth cards are the same thing”, so today's card is the birth card of today's date, the same for everyone.
  • The Joker. Not in the pack Richmond deals, so it has no place in any spread, and no life path, ruling card, karma cards or periods. “His solar value being zero”, Richmond writes, and yet “on the 31st of December the Jester rules supreme”.

Checked twice over. Our engine was written from Richmond's text and checked against every published example we found, Camp's own Life Spread chart cell for cell among them. A second program, written separately from Richmond with a different model of the pack, then agreed with it on every day of 1990 and 2000, on 65,610 yearly cards, on 9,477 seven-year cards and on 1,045 periods; Camp's own calculator agreed on ten dates out of ten. That shows the arithmetic is done as its authors describe it.

Origins and history

The cards are medieval, the calendar sums are a soldier's joke of the 1770s, the spreads are Richmond's of 1893, the character readings date from 1947, and the life path and yearly periods from 1992.

When Who What happened
9th century Tang China Playing cards most likely invented with woodblock printing.
1371 to 1377 Catalonia, Florence, Switzerland, Paris The first European records of playing cards; Mamluk packs of 52 cards in four suits survive from the 15th century.
About 1480 French card makers The suits of hearts, clubs, diamonds and spades.
1770s Anonymous broadsides Cards Spiritualized; or, the Soldier's Almanac: a soldier caught with cards in church explains them as his almanac, 365 spots for the days, 52 cards for the weeks, 13 tricks for the months. The calendar idea is a century older than Richmond.
1799 to 1801 Edward Ludlow and Ann Wilcox, England Double-headed court cards patented and sold.
22 February 1844 Olney Hawkins Richmond Born in Clinton County, Michigan; married at Cedar Springs, near Grand Rapids, in 1866.
1850s to 1874 American card makers The Joker added to the euchre pack as its top trump, the “best bower”; sold in Britain from 1874.
22 May 1873 A newspaper advert in Missouri “Gamblers Tricks, Cardology, Ventriloquism”: the earliest use of the word found, for card tricks.
1892 Richmond, Grand Temple of the Order of the Magi, Chicago Temple Lectures of the Order of the Magi, given to its classes over about sixteen months.
23 January 1893 Richmond, The Temple Publishing Company, Chicago The Mystic Test Book entered for copyright: the solar values, the Joker as zero and as 31 December, the quadration, the grand spread, the ninety quadrates, the day-card rule and the card tables are all here.
1896 Richmond The Supplement, with the engraved spread of Figure 3 and the rule that day cards and birth cards are the same thing.
About 1915 P. R. S. Foli, London Fortune-Telling by Cards ties the nine of hearts to wishes, an early printed use of the label later pinned on the Nine of Hearts.
June 1919 Richmond Third edition, revised and enlarged.
30 March 1920 Richmond Dies in Chicago. Camp's account has his daughter Arline carrying on the work.
1934 to 1941 Jan Eric; Michael F. Zens “Astro-cardology” registered as works of art and a book; “Cardology of Tomorrow”, a card-magic pamphlet. Whether Jan Eric used Richmond's system is unknown.
22 December 1947 Edith L. Randall and Florence Evylinn Campbell, Hollywood Sacred Symbols of the Ancients registered; by Camp's account the first book to read the 52 birth cards as personalities. Renewed in 1974.
1978 Arne Lein What's Your Card?; Lein, Randall's student by Camp's account, taught the cards in Hollywood.
1988 to 1991 Robert Lee Camp Meets Lein in 1988; says he was made Grand Master of the Order of the Magi in 1991.
1992 Camp, Seven Thunders Publishing, Tampa The Cards of Your Destiny: the yearly spreads, the Long Range, Pluto, Result, Environment and Displacement cards and the 52-day periods in print.
1997 and 1998 Camp Love Cards (the karma cards and the planetary ruling card) and Destiny Cards, whose title many people now use as a name for his system.
2004 to 2014 Camp; Sharon Jeffers New editions of Camp's books, Your Birthday, Your Card (2008) and a book on the Seven Thunders (2013); Jeffers' Love and Destiny (2008) in the same line.
2005 Iain McLaren-Owens The earliest catalogued use of “cardology” for the birth-card system.
2018 to 2025 The USPTO CARDOLOGY registered for playing cards and their online sale (2019); the word disclaimed in a mark for courses (2022) and refused as merely descriptive (2023).
2021 to 2026 Many authors and app makers More than twenty birth-card books and several apps with “Cardology” in the title; no major dictionary lists the word.
October 2026 EsoTerrier The engine rebuilt from Richmond's quadration and checked; the suit planets, elements and seasons dropped from the chart; every card text rewritten from Richmond.
Rows of rounded, cream-coloured painted playing cards on a black ground: in each row a crowned king, a queen and a knave in fifteenth-century dress, followed by numbered cards whose pips are hunting horns, dog collars, hound tethers and nooses in blue, red and gold.
Figure 4. The Cloisters Playing Cards, painted in the Burgundian Netherlands about 1475 to 1480, here the courts and first pips of the four suits: each suit has a king, a queen and a knave above ten numbered cards, 52 in all, the only complete pack of ordinary illuminated playing cards known from the fifteenth century. Its suit signs are hunting gear, horns, dog collars, hound tethers and game nooses; the hearts, clubs, diamonds and spades of the French pack came at about the same time. About 1475 to 1480. The Metropolitan Museum of Art, CC0 1.0.

Nothing about the pack was designed for divination. The four suits and the courts came out of Mamluk and European games, and the French suit signs that Richmond read as seasons were a card maker's simplification of about 1480. What Richmond added was arithmetic: he numbered the cards, found a dealing rule that returns the pack to order after ninety passes, and wrote a book of meanings for each card under each planet. His book was a working manual for readings with a shuffled and cut pack; the fixed solar spreads, which he called “wholly arbitrary in formation” though worth study, became the whole of the modern system.

The modern line read Richmond's spreads as character rather than events. Randall and Campbell's book of 1947 gave the 52 birth cards personalities; Lein taught them in the 1970s; Camp added the life path, the planetary ruling card, the karma cards and the yearly periods, and his books made the system widely known. The word “cardology” came last: it named card tricks in 1873 and the birth-card system only from about 2005. Richmond never used it, and neither does Camp.

The 53 cards

Each card has its own page, in the natural order Richmond counts them, with the Joker last: its birthdays and the Sun signs they fall under, its place in the Life Spread, its life path and karma cards, its ruling card for each sign, Richmond's reading of it in his own words, ours, and what the schools say about it.

Variants and what we leave out

Cardology has no single authority, and the schools disagree. We describe the choices so you can recognise them, and say what we do.

  • Richmond's own practice. Richmond read events, not personalities: letters, visits, journeys, gains and losses, illnesses, under each of the seven planets, from a pack shuffled and cut by the sitter and the reader at timed intervals. He also taught minute and hour cards, “mystic crosses” and magic squares he called tarots. None of this is in our chart; his tables are quoted as history only.
  • The character readings. Randall and Campbell, Lein and Camp read the birth cards as personalities. Their books are in copyright, and our texts owe them nothing: they were written from Richmond's tables and the plain sense of suit and number.
  • Camp's additions we leave out. The personality cards (a Jack for men, a Queen for women), the decanate ruling card (sold as a course, its rule unpublished), a personal daily card (also unpublished), lists of favourable years, compatibility scores, and his nickname for each card.
  • The start of the periods. Camp makes the birthday the first day of the Mercury period; Card Blueprints makes it a “day zero” and starts Mercury the next day. Ours is Camp's. For a 29 February birthday we use 28 February in other years; some programs use 1 March.
  • Cusps. Some sites use a fixed table of cusp dates, some ask you for your sign. We compute the Sun and give both cards only when it changed sign during your birth day and no birth time is known.
  • The fixed cards' karma cards. None, by the definition; some readers give each fixed card the other two.
  • “Karma cousin”. Seven Reflections' name for the second karma card; a separate connection in Camp's Love Cards. The two uses differ, and we use neither.
  • The Long Range and vertical cards. Our Long Range card follows the one teacher who states the rule, confirmed against Camp's calculator; the vertical card follows one published example.
  • Longer life paths. Some authors add an eleventh and a twelfth card with varying names. We stop at the Cosmic Lesson.
  • The Joker by the clock. One teacher reads a 31 December birth before noon as the Ace of Hearts and after noon as the King of Spades. A single source, never offered here.
  • Suit elements, planets and seasons. Many sites give each suit an element and a planet, and they disagree; no founding text does. Richmond gives the suits seasons, Hearts spring, Clubs summer, Diamonds autumn, Spades winter, and two planets each. We report his as facts about his book and show none on the chart.
  • Compatibility. Reading two people's cards against each other is the tradition's best-known extension. Not offered for now, and never with Camp's scores.

Myths and disputed claims

What is said about Cardology, who says it, and what the record shows. The label is ours.

  • Playing cards were first made in Atlantis and kept in its Temple of Wisdom, and the Order of the Magi carried them to Egypt about 13,000 BC.

    told as lore

    Who says it: Richmond (1893, pp. 13 to 17, and the 1896 Supplement), repeated by Camp's site and the International Association of Cardology.

    What the record shows: Richmond's own origin story, which he told as history. There is no evidence for Atlantis. Playing cards are recorded in 9th-century China and 14th-century Europe, the French suits from about 1480 and the Joker from the 1850s.

  • The Order of the Magi is more than 20,000 years old and counted the Chaldeans, the three Magi and Pythagoras among its members.

    told as lore

    Who says it: Camp's site and the International Association of Cardology.

    What the record shows: No record of the Order exists before Richmond's own, which met in Chicago by 1892. Told as the tradition's lore, with its tellers named.

  • The cards were disguised as a game and given to the Romani for safekeeping, which is how their secret survived.

    told as lore

    Who says it: The International Association of Cardology; Richmond mentions the idea in passing (1893, p. 12).

    What the record shows: The Romani story comes from nineteenth-century French occultists and has no evidence behind it; no Romani card reading is recorded before the twentieth century.

  • The 52-card pack was designed as a calendar: 52 cards for the weeks, four suits for the seasons, twelve court cards for the months, 365 spots for the days.

    disputed

    Who says it: Richmond (1893, pp. 27 to 28, 36, 40), an 18th-century soldier's broadside, our own old page and most Cardology sites.

    What the record shows: The sums are real and the idea is old folklore, printed in the 1770s. Nothing shows that anyone designed the pack this way: it grew out of Mamluk and European card games, and the Joker that makes 365¼ was added for euchre in the 1850s.

  • The Joker has a solar value of one and a quarter.

    false

    Who says it: Our own old page and one Cardology site.

    What the record shows: Richmond gives the Joker a solar value of zero (“His solar value being zero”, p. 35). He counts the Jester as five-fourths only in a different sum, the spots of the whole pack, which makes 365¼ (p. 40).

  • The seven rows of the spread are the seven planets the ancient world could see.

    false

    Who says it: Our own old page.

    What the record shows: Richmond's rows run Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune. Uranus was found in 1781 and Neptune in 1846; the old seven were the Sun, the Moon and five planets.

  • A solar year holds thirteen lunar months of 28 days each.

    false

    Who says it: Our own old page.

    What the record shows: A lunar month is about 29.53 days, and a year holds about 12.37 of them. Richmond reads the thirteen cards of a suit as the Sun and the twelve signs (p. 56).

  • Richmond opened his Chicago temple years before the book, and timed the book to the World's Parliament of Religions.

    unverified

    Who says it: Our own old page; Camp's site gives 1894 for the book.

    What the record shows: The record supports less: the Temple Lectures were published in 1892 at the Grand Temple in Chicago, the book was entered for copyright on 23 January 1893, and the Parliament met that September. We write “by 1892 in Chicago” and nothing more exact.

  • Cardology gives an exact, fixed reading of a person's character and of the course of a life.

    false

    Who says it: Our own old page, and 39 of the 53 old card pages.

    What the record shows: No study has tested it. The arithmetic is exact; the meanings are a tradition's symbols.

  • The meaning of the cards was kept secret by hidden orders and passed on by word of mouth until Richmond revealed it.

    unverified

    Who says it: Our own old page, Camp, the International Association of Cardology, and Richmond himself (1893, p. 11).

    What the record shows: No document, lodge record or earlier book shows the system before 1893. The only evidence of an older tradition is Richmond's word, and his own preface says the book was written because his Temple's members wanted a textbook.

  • Richmond's book introduced formulas that read a person's character from the birth date.

    false

    Who says it: Our own old page.

    What the record shows: Richmond's book reads events, card by card under each planet, from spreads of a shuffled and cut pack. Character readings of the 52 birth cards begin with Randall and Campbell in 1947, and the life path and yearly readings with Camp from 1992.

  • Each suit has an element and a ruling planet.

    disputed

    Who says it: Our own chart until October 2026, most Cardology sites, and tarot convention.

    What the record shows: No founding text gives the suits elements, and the sources that do disagree with each other. Richmond gives each suit a season and two planets (pp. 27 to 28, 41), which we report as his. We dropped the attributes in October 2026.

  • The Nine of Hearts is the card of wishes.

    disputed

    Who says it: English cartomancy, many Cardology sites, and our own old text.

    What the record shows: A fortune-teller's label: P. R. S. Foli's Fortune-Telling by Cards (about 1915), which ties the nine of hearts to wishes, is an early printed use. In Richmond's table the Nine of Hearts is disappointment in love.

  • The Ace of Spades is a card of death and rebirth.

    false

    Who says it: Tarot and cartomancy readings, and our own old text.

    What the record shows: In this tradition the Ace of Spades is Richmond's card of a secret and the emblem of his Order (“With mystics it represents the Order of the Magi”, p. 155). The other reading belongs to other systems.

  • The Joker is the rarest birth card, because it has only one birthday.

    false

    Who says it: Our own old text and some Cardology sites.

    What the record shows: Four other cards also have a single birthday: the King of Spades (1 January), the Queen of Spades (2 January), the Two of Hearts (29 December) and the Ace of Hearts (30 December). The Joker's real distinction is that it stands outside the spreads.

  • The Joker is also the card of 30 December in leap years.

    false

    Who says it: Our own old Joker page.

    What the record shows: 30 December is always the Ace of Hearts and 31 December always the Joker. A leap year changes only 29 February, which is the Nine of Clubs.

  • The ruling card follows a fixed table of cusp dates, the same every year.

    disputed

    Who says it: Card Blueprints; Seven Reflections asks the user instead.

    What the record shows: The Sun enters a sign on different days across the leap-year cycle and in different time zones, so a fixed table is wrong on some days of some years. We compute the Sun's sign and show both cards only when it changed sign during the birth day and no birth time is known.

  • Each fixed card has the other two fixed cards as its karma cards.

    disputed

    Who says it: Some readers; Seven Reflections and Card Blueprints give the fixed cards none.

    What the record shows: By the definition of the karma cards a fixed card's two karma cards would be itself, so we give none, as most schools do. The other view is noted as a variant.

  • Richmond was a pharmacist and a checkers champion, and corrected the published motion of Neptune with playing cards.

    unverified

    Who says it: Camp's account of the founder.

    What the record shows: No independent record of the pharmacy, the championship or the tables. A checkers problem credited to an O. H. Richmond of Grand Rapids was printed in the 1880s, which fits a player of that name, and nothing more.

  • The Order of the Magi passed from Richmond through his daughter, Randall and Campbell, Lein and Frank Koenig to Camp, made Grand Master in 1991.

    unverified

    Who says it: Camp.

    What the record shows: Camp's own account of his lineage; nothing outside his pages confirms it. We say that Camp states it.

  • The word “cardology” was first used in 1934.

    false

    Who says it: The International Association of Cardology.

    What the record shows: Newspaper adverts for “Cardology”, meaning card tricks, ran in Missouri and Louisiana in 1873. The word was used for the birth-card system only from about 2005.

  • “Cardology” is a registered trade mark for the practice.

    disputed

    Who says it: The International Association of Cardology.

    What the record shows: The live US registration covers playing cards, puzzles and their online sale; the same owner's mark for courses disclaims the word, and the USPTO refused it in 2023 as merely descriptive. We use it only as the practice's common name. Not legal advice.

  • The birth-card formula is a modern shortcut, not Richmond's.

    false

    Who says it: Our own research notes of 9 October 2026.

    What the record shows: Run from the 1893 scan for all 366 days, Richmond's own rule gives the formula's card on every one, once a single digit of his printed day table, for the 9th of the month, is read as 5 rather than 4. The formula is his table restated.

  • The pack of cards is the little book of Revelation 10, and the Seven Thunders are the voices of the seven planets.

    told as lore

    Who says it: Richmond (1893, pp. 9 to 13).

    What the record shows: Richmond's own reading of scripture, which gave Camp's publishing house its name. Quoted as his.

  • The Jack of Hearts is Christ, fixed at the centre of a cross in the spread, with the King of Spades and the Eight of Clubs fixed beside him.

    told as lore

    Who says it: Richmond (1893, pp. 180 to 182; 1919).

    What the record shows: The arithmetic is real: these three cards never move under the quadration. The reading of it is Richmond's theology, quoted as his.

  • The cards, and the Spades above all, foretell illness, accidents and losses.

    disputed

    Who says it: Richmond's tables, Camp's period texts, and our own old texts.

    What the record shows: The tradition does read such events into the cards. Richmond's event lines are quoted here as history, and our readings leave them out.

  • The cards show past lives and mark old souls, and the Spades are the suit of old souls.

    unverified

    Who says it: Sites in Camp's line, and our own old texts.

    What the record shows: Nothing of this is in Richmond. In Camp's system “karma” names a relation between two spreads; reincarnation is a belief, not part of the arithmetic.

  • The spread is the script of a life, and the quadration copies the orbits of the planets.

    unverified

    Who says it: Our own old page, after a modern school's term.

    What the record shows: Not Richmond's ideas. His quadration is a way of dealing a pack, which he explains through the houses and the Sun; it models no orbit.

  • The red and black suits stand for day and night, and for a positive and negative energy.

    told as lore

    Who says it: Richmond (pp. 28 to 29) for day and night; our own old page for the energy.

    What the record shows: Day and night are Richmond's symbolism and may be quoted as his. The energy is a modern addition with no source.

  • Each card has a traditional nickname.

    disputed

    Who says it: Camp's texts and most Cardology sites.

    What the record shows: The nicknames are Camp's coinages, or Randall and Campbell's, not Richmond's; taken as a set they mark a text as derived from his. We use none of them.

  • Double-headed court cards were new in 1893, and the court figures keep Egyptian emblems.

    false

    Who says it: Richmond (1893, pp. 29 to 30).

    What the record shows: Double-headed courts were patented in England in 1799. The English court figures descend from fifteenth-century French designs, not from Egypt.

  • Tarot rests on intuition and the shuffle, while Cardology is fixed arithmetic.

    disputed

    Who says it: Our own old page.

    What the record shows: Richmond himself read shuffled and cut packs with timed cuts; only the solar spreads are fixed. And tarot birth cards are worked out from the date too.

  • The Sevens are spiritual tests, the Sixes fate and return, the Nines universal giving.

    disputed

    Who says it: Camp and the sites that follow him.

    What the record shows: Richmond reads the Sevens as obstacles, the Sixes as monotony and settlement and the Nines as disappointment (1893, pp. 42 to 45). The modern readings are the tradition's later development.

  • The Joker is the tarot's unnumbered trump under another name.

    unverified

    Who says it: Camp and many sites.

    What the record shows: Richmond links the Jester to no tarot card, and says only that someone invented it a few years before 1893 for certain games (p. 35). We record the link as Camp's.

Stories and lore

These are the tradition's stories, told as their tellers told them. Richmond's books are in the public domain, and the short quotations are his.

The little book and the Seven Thunders. Richmond opens with the tenth chapter of Revelation, where an angel gives John a little book, sweet in the mouth and bitter in the belly, and seven thunders utter their voices. The little book, he says, is the pack of cards, and the seven thunders are “the voices of the seven planets”. He calls the pack “the oldest book known”. Camp named his publishing house Seven Thunders after the passage. Told as Richmond's reading of scripture.

The Temple of Wisdom. Richmond's Atlantis is a round lake on a highland with a palace on a rock in the middle, canals to the four quarters and four rivers running from one source, and a Temple of Wisdom in its garden where the priests taught the Religion of the Stars. Its colonies reached Egypt, South America and a great lake over Michigan; the Order of the Magi dedicated its first Egyptian temple about 13,000 BC; and the island sank “in a day and night”, leaving the Azores. Told as legend.

The faces of the court cards. Richmond saw old emblems surviving on the modern cards: the King of Clubs, “the king of wisdom”, still holding the winged globe of Mercury; the Queens looking out “from the same Egyptian eyes”; the Queen of Spades not having laid aside her emblem of labour; and the Knaves, “originally honest men all”, gone bad when their modern counterparts took bribes. He thought double-headed courts were a few years old; they had been patented in 1799. Told as Richmond's lore.

The cross that never moves. Richmond drew a great cross in the solar spread with the Jack of Hearts at its centre, which he read as Jesus, the two Marys at its foot and “the secret emblem” at its head, and noticed that the quadration “endlessly produces Christ upon the same place in this cross”, while “the king of spades, a representative of the kingly power, and the 8 of clubs” stay put as well. The arithmetic is real, the three fixed cards; the reading is his theology.

The Jester's day. Richmond counted the spots of the pack, 364, as the 52 cards times the seven planets, and the Joker as five-fourths of a day to make 365¼. “On the 31st of December the Jester rules supreme, even the Members of the Court bow to him.” The card he calls the Jester had been made for euchre about thirty years before.

Figures will not lie. The book ends with a hymn to number against scripture: “figures are facts, figures will not lie”, and the belief that “man controls his own destiny” must give way before the figures of mysticism. The Order, Richmond writes, is a true secret order, “but the Religion of the Stars ... is not secret”, and its Grand Temple stands “at this date, 1893, at 1910 Washington Boulevard, Chicago”.

The founder as the tradition remembers him. Camp's page makes Richmond a pharmacist and a checkers champion who studied for twenty-five years before publishing, founded temples in Grand Rapids and Chicago and corrected the astronomers' tables of Neptune with cards. The records show a Michigan farmer's son, married near Grand Rapids in 1866 and dead in Chicago in 1920, and a checkers problem printed under the name in the 1880s. The rest is the tradition's.

Richmond and Papus. Handed Papus's Tarot of the Bohemians, Richmond was delighted by its chapter headings, then found its 78-card pack “worthless as a test book”, a “bogus test book” of “Popes and Devils”, and complained that the occult writers “all quote and re-quote from each other”. For him the word tarot meant the magic squares of his own system.

Evidence and criticism

No study exists. No scholar, sceptic or believer has studied Cardology, and no scholarly treatment of Richmond or his Order was found. The only sources on the system's history are the founder's books and the sites of the schools that descend from him.

The arithmetic is what it claims to be. Richmond's quadration is a fixed shuffle that returns after ninety passes, with three cards that never move, two pairs that swap and one cycle of 45; the birth-card formula equals his 1893 table on all 366 days; and independent programs, Camp's calculator and two other sites agree with ours on every date run. Nothing in the system depends on the sky except the Sun sign behind the ruling card.

One card for many birthdays. A birth-card reading gives one character to everyone born on a card's birthdays, a few days scattered through the year, with no mechanism offered beyond Richmond's “astral” correspondences. The feeling that such a reading fits is what the psychology of personal validation leads one to expect: Bertram Forer showed in 1949 that people rate a vague sketch meant for everyone as an accurate description of themselves.

The tradition disagrees with itself. Asked which of the several meanings under a card was the right one, Richmond replied that “cast-iron rules” could not be given. The modern schools differ on when the periods start, how cusps are handled, the fixed cards' karma cards, “karma cousins”, the names of the later life-path cards and the daily card, and the suit attributes they add disagree with each other and with Richmond. The history they teach, from Atlantis to Egypt, is contradicted by the documented history of playing cards and of the Joker.

Our own record. Until October 2026 our page called the pack a designed calendar, gave the Joker a solar value of one and a quarter, placed Richmond's temple years too early, gave him a profession no record shows, and promised a fixed reading of character; our card pages carried suit elements, other authors' card names, and readings about health and means, and were withheld from view in October 2026. All of that has been replaced.

What we keep apart. Richmond's tables foretell events of every kind, and Camp's texts give the Spades and the Saturn place to the body. We quote Richmond as history and write nothing about health, accidents, means or the law.

The name and the marks. “Cardology” is used here as the practice's common name. The word is registered in the United States for playing cards, puzzles and their online sale, and for greeting cards, but no mark covers readings, education or apps, and the USPTO has refused it as merely descriptive. We never use it as a brand, and the notice at the foot of every Cardology page names the holders. Camp's books and pages, Randall and Campbell's and Lein's books and the practitioner sites are cited for facts only; Richmond is quoted, briefly and with credit.

Terms

Birth card
The card of a birthday. Richmond calls it the day card too: “Day cards and birth cards are the same thing” (1896, p. 290).
Solar value
Richmond's number for a card, 1 to 52: the Hearts count from 0, the Clubs from 13, the Diamonds from 26 and the Spades from 39, with the Jack 11, the Queen 12 and the King 13. The Joker's is zero.
Natural order
The pack in order of solar value, Ace of Hearts to King of Spades. The tradition calls it the Spiritual or Natural spread; Richmond's “independent solar spread” is dealt from it.
Quadration
Richmond's dealing rule (1893, pp. 55 to 56): the pack dealt in blocks of three, then singly, to four quarters and gathered up, twice over. One application is a quadrate; ninety bring the pack back to its natural order.
Life Spread
The first quadration of the natural order, laid out in seven rows of seven with three cards above: the spread every birth card is read from. Richmond's “grand spread”.
Crown line
The three cards laid above the seven rows, over the Mars, Jupiter and Saturn columns. Richmond's “sun cards”.
Life path
The card before yours in the Life Spread (the Moon card) and the ten after it, named Mercury to Neptune, Pluto, Result and Cosmic Lesson. Camp's names, used descriptively.
Planetary ruling card
The card on your life path in the place of your Sun sign's ruling planet: Capricorn, ruled by Saturn, takes the Saturn card. Camp's term; Richmond's own “ruling card” means a day's card.
Karma cards
The natural-order card that sits in your Life Spread place, and the Life Spread card that sits in your natural place. A structural relation between two spreads; the name is Camp's, and nothing more is read into it.
Fixed and semi-fixed cards
The Jack of Hearts, Eight of Clubs and King of Spades never move under the quadration; the Ace of Clubs and Two of Hearts, and the Seven of Diamonds and Nine of Hearts, swap places in every spread. Camp calls the seven the Family of Seven.
Yearly spread
The spread for one year of age: age 0 uses the Life Spread, age 1 the next quadration, and so on to age 89, the natural order. The Long Range, Pluto, Result, Environment and Displacement cards of a year are read from it.
52-day periods
The year from one birthday to the next in seven periods named Mercury to Neptune, each with a card. Camp's convention, with the birthday as the first day of Mercury.
Card of the day
Richmond's rule: the birth card of today's date, the same for everyone. Not a personal daily card.
Order of the Magi
Richmond's order, whose Grand Temple stood in Chicago by 1892 and for whose members he wrote The Mystic Test Book. Not the same body as N. E. Wood's Ancient Order of the Oriental Magi, a separate Chicago society of the same years.
The Joker
Richmond's “Joker or Jester”, solar value zero, the card of 31 December. It stands outside the 52 and has no place in any spread.

Sample reading

Sample reading, AI-written for a fictional person.

Read the sample (1,250 words)

AI output can be wrong.

The Power You Carry Into a Room

Jason, your birth card is the Eight of Diamonds, solar value 34, set in the crown line of the Life Spread in the Jupiter column, and your ruling card is the Ten of Spades, given by Capricorn, ruled by Saturn. That Ten of Spades also stands as the Saturn card on your own life path. The card that rules you and the card you meet in the house of discipline are one and the same, and that doubling says a great deal about how you work.

Richmond's table gives the Eight of Diamonds "Sudden accession of power," and the tradition reads the card as drive joined to a good head for organising whatever is at hand: people, time, materials, attention. You tend to prefer running your own work to being run by someone else's. You can carry real weight, and you often do so before anyone asks you to. The Eight of Diamonds is not one of the cards that hold still. It moves through the spreads, and that movement is why it carries karma cards at all.

You will know the moment. A plan is being discussed and it is going sideways: the timeline is vague, nobody owns the next step, and three people are talking past each other. While they are still talking, you have already rebuilt the plan in your head, sequenced it, assigned the pieces, and spotted the one resource nobody has counted. Then you face the familiar choice. You can say it gently, or you can simply take the wheel.

Others tend to experience you as capable to the point of being relied upon by default. That reliance feels like respect. Sometimes it is. Sometimes it is just convenience.

Labour as a Second Spine

The Ten of Spades sits in the Mercury row of the Life Spread, also in the Jupiter column, the same column as your birth card. Richmond read it as "Successful labor" and as the strength to bear trouble for some great good. Where the Eight of Diamonds supplies the instinct for power and worth, the Ten of Spades supplies the stamina. Together they tend to produce someone who takes on large projects because large projects feel like the right size.

This is where the edge begins. The Ten of Spades, as the tradition reads it, rounds out its success only when rest and relationships get as much room as achievement. You may notice that you plan your downtime the way you plan a deliverable, or that you feel faintly restless when nothing needs organising. The card's lesson is not to want less. It is to stop treating effort as the only proof that you deserve your place.

The Eight of Diamonds carries its own version of the same lesson: measure success by more than status or possessions, and share the stage. Your two governing cards press toward capability, and both carry the same warning. Capability can become the whole of your identity, and then every room becomes a test you must pass.

On the path itself, the Ten of Clubs stands just before your birth card in the crown line as its Moon card, and the King of Spades just after it as the Mercury card. Further on, the life path closes with the Seven of Hearts as its Result and the Seven of Diamonds as its Cosmic Lesson. That last card is the tradition's long question about value, and it waits at the far end of the spread.

The Ties That Pull Both Ways

By Camp's method you are the card that gives to the Queen of Spades, and the card that gives to you is the Seven of Clubs. The tradition reads people born under these cards as close ties in your life, never as debts owed.

The Queen of Spades, the birth card of January 2, is in Richmond's words a hard-working woman who delights in running things. In a sense she is your own industriousness reflected back. Those born under her tend to be practical and self-reliant, with firm ideas about how things should be done. You give to that energy, which may mean you recognise yourself in such people and offer them the ambition and sense of worth they sometimes forget to claim.

The Seven of Clubs runs the other way. Richmond's table gives it "Opposition to your projects," and worry. It is a mind tested by doubt, one that questions everything, itself included. Those born under it give to you. What they bring is often the friction your certainty lacks: the person who asks the awkward question about the plan you have already decided is perfect. Their doubt can feel like an obstacle. The tradition suggests it may be a gift, because it is the one force in your field that slows you down long enough to think again.

This Year: Taste, Want, and Staying Power

You are 37, in the year that began on 19 January 2026. The Long Range card, the year's theme, is the Queen of Diamonds: taste, generosity, a feel for what is worth having. Richmond pictured her as warm-hearted and charitable, a lover of beautiful things. The theme asks you to enjoy what you have built and to share it, which is not a natural reflex for a card that keeps scanning for the next thing to organise.

The Pluto card, the year's challenge, is the Ace of Diamonds, which tends to begin with wanting: a goal, something worth building. The challenge is to ask what you truly value beyond what you can hold. The Result card, the reward, is the Eight of Clubs, one of the three fixed cards. Richmond placed it at the right-hand end of his quadratic cross as "power in knowledge," and it never moves through any of the spreads. It speaks of concentration that holds through difficulty, with the warning that firmness can harden into stubbornness unless you stay willing to be wrong. The Environment card is the Six of Clubs and the Displacement card is the Nine of Clubs.

By Camp's dating your Mercury period began on your birthday. The periods run as follows:

  • Mercury, 19 January to 11 March: Three of Clubs.
  • Venus, 12 March to 2 May: Ace of Clubs.
  • Mars, 3 May to 23 June: Five of Diamonds.
  • Jupiter, 24 June to 14 August: Five of Clubs.
  • Saturn, 15 August to 5 October: Jack of Diamonds.
  • Uranus, 6 October to 26 November: Three of Spades.
  • Neptune, 27 November to 18 January 2027: Two of Clubs.

As of 27 October 2026 you are on day 22 of your Uranus period, under the Three of Spades. This card also sits in the Jupiter column, in the Saturn row, so it shares a column with both your birth card and your ruling card. Richmond's line for it describes a moment where two courses open and both require much work. The tradition reads this period as one of many tasks and many talents, and of the strain of trying to keep every road open at once. What it favours is choosing fewer commitments and making room for rest, so that your abilities show instead of scattering. What it asks of you specifically is to notice where you are carrying two loads simply because you can.

One Thing to Do

The next time you see a plan you could run entirely on your own, pick out its most visible piece, the part that would earn you credit, and hand it to someone else to lead. Then stay in the room while they do it.

Sources

Primary texts (17)
  1. Olney H. Richmond, The Mystic Test Book, or the Magic of the Cards. Chicago: The Temple Publishing Company, 1893 (copyright entry of 23 January 1893). Library of Congress copy. archive.org/details/mystictestbook01rich
  2. Olney H. Richmond, Mystic Test Book Supplement. Chicago: The Temple Publishing Company, 1896. Library of Congress copy. archive.org/details/mystictestbook00rich
  3. Olney H. Richmond, The Mystic Test Book, third edition, revised and enlarged. Chicago, 1919. Library of Congress copy. archive.org/details/mystictestbookor00rich
  4. Olney H. Richmond, Temple Lectures of the Order of the Magi. Chicago, 1892 (catalogue record). loc.gov/item/09016947
  5. Edith L. Randall and Florence Evylinn Campbell, Sacred Symbols of the Ancients. Hollywood: Tora, 1947; renewed 1974. Facts only. openlibrary.org/works/OL9211091W
  6. Arne Lein, What's Your Card? Meta-Card, 1978. Facts only. openlibrary.org/works/OL7091791W
  7. Robert Lee Camp, The Cards of Your Destiny. Tampa: Seven Thunders Publishing, 1992; Sourcebooks, 2004 and 2014. Facts only. lccn.loc.gov/93197701
  8. Robert Lee Camp, Love Cards. Sourcebooks, 1997; 2004 and 2014. Facts only. lccn.loc.gov/97001800
  9. Robert Lee Camp, Destiny Cards. Sourcebooks, 1998. Facts only. lccn.loc.gov/97041430
  10. Robert Lee Camp, Your Birthday, Your Card (Sourcebooks, 2008) and Exploring the Little Book of the Seven Thunders (2013). Facts only. lccn.loc.gov/2008018834
  11. Fair Play (Ste. Genevieve, Missouri), 22 May 1873, page 4: an advertisement for “Gamblers Tricks, Cardology, Ventriloquism”. Chronicling America, Library of Congress. loc.gov/resource/sn87052181/1873-05-22/ed-1/?sp=4
  12. Catalog of Copyright Entries: Jan Eric, Astro-cardology (1934); Michael F. Zens, Cardology of Tomorrow (1941). archive.org/details/catalogofcopyri321libr/page/n322
  13. Catalog of Copyright Entries, third series: the registration of Sacred Symbols of the Ancients (22 December 1947, AA36490) and its renewal (27 December 1974, R594088). archive.org/details/catalogofcopyrig32812libr
  14. P. R. S. Foli, Fortune-Telling by Cards. London, about 1915. sacred-texts.com/tarot/ftc/index.htm
  15. United States Patent and Trademark Office, records of CARDOLOGY (Reg. 5703102 and Reg. 7561500) and SACRED CARDOLOGY (Reg. 6778379). tsdr.uspto.gov/statusview/sn88072857
  16. United States Patent and Trademark Office, office action of 26 December 2023 refusing CARDOLOGY (serial 79376083) as merely descriptive.
  17. United States Copyright Office, Circular 33: Works Not Protected by Copyright (2021). copyright.gov/circs/circ33.pdf
Studies and other sources (23)
  1. Olney Hawkins Richmond (1844 to 1920), genealogical record, FamilySearch community tree. ancestors.familysearch.org/en/277L-V8T/olney-hawkins-richmond-1844-1920
  2. Robert Lee Camp, “The Order of the Magi on Terra” (cardsofyourdestiny.com, read 2026). Facts only. cardsofyourdestiny.com/the-order-of-the-magi-on-terra
  3. Robert Lee Camp, “About Robert Lee Camp” (cardsofyourdestiny.com, read 2026). Facts only. cardsofyourdestiny.com/about-robert-lee-camp
  4. International Association of Cardology, “History of Cardology” (cardology.com, read 2026). Facts only. cardology.com/history-of-cardology
  5. Sharon Jeffers, Love and Destiny. Hampton Roads, 2008. Facts only.
  6. Robert Lee Camp, report instructions on the period dates and the Family of Seven (destinyreports.com, read 2026). Facts only. destinyreports.com/m/instructions.html
  7. Robert Lee Camp, “The Life Spread”, his published chart (cardsofyourdestiny.com, read 2026). Facts only. cardsofyourdestiny.com/life-spread
  8. createtheleap.com, the planetary ruling card rule with a worked example (read 2026). Facts only. createtheleap.com/birth-ruling-card-spreads
  9. Card Blueprints, methodology, calculator and period pages (cardblueprints.com, read 2026). Facts only. cardblueprints.com/methodology
  10. Know Your Destiny Cards, the cards with Camp's applet texts, published with his permission (knowyourdestinycards.com, read 2026). Facts only. knowyourdestinycards.com/about-the-cards/spreads
  11. Seven Reflections, birth, karma and cusp pages (sevenreflections.com, read 2026). Facts only. sevenreflections.com/cards
  12. Card Psychology, posts on the yearly and seven-year cards and the life path (Substack, read 2026). Facts only. cardpsychology.substack.com/p/how-to-find-your-7-year-cards-and
  13. Metasymbology, Destiny Card System and Aquarius Maximus, on Lein, cusp birthdays and the ninety spreads (read 2026). Facts only. destinycardsystem.com/what-s-your-card
  14. The My Destiny Cards widget, Camp's calculator, run with invented dates on 12 October 2026. destinycards.ai/embed.html
  15. Open-source Cardology programs read for their rules: playthecardsyouredealt.com, mnyon-grandkru/cardology and a mirror of Card Blueprints (GitHub, read 2026).
  16. EUIPO TMview, records of CARDOLOGY marks in the United Kingdom and under the Madrid system, and of “DestinyCards” in France (read 2026). tmdn.org/tmview
  17. Library and bookseller records of later “cardology” titles, from Wyatt (1999) and McLaren-Owens (2005) to the books of 2021 to 2026.
  18. Dunham Bible Museum, “The Soldier's Bible, or a Deck of Cards”, on the 18th-century broadside Cards Spiritualized; or, the Soldier's Almanac. hc.edu/museums/dunham-bible-museum/influence-in-history-and-culture/the-soldiers-bible-or-a-deck-of-cards
  19. “Ancient Order of the Oriental Magi”, a hobby wiki of American occult societies (hatch.kookscience.com, read 2026). hatch.kookscience.com/wiki/Ancient_Order_of_the_Oriental_Magi
  20. Bob Newell, “A Grand Rapids Speedster”, The Checker Maven (2012), on a problem credited to O. H. Richmond of Grand Rapids. bobnewell.net/nucleus/checkers.php?itemid=753
  21. Bertram R. Forer, “The fallacy of personal validation: a classroom demonstration of gullibility”, Journal of Abnormal and Social Psychology 44 (1949), pp. 118 to 123. doi.org/10.1037/h0059240
  22. “Joker (playing card)”, Wikipedia (orientation only). en.wikipedia.org/wiki/Joker_(playing_card)
  23. “Playing card”, Wikipedia, its history section (orientation only). en.wikipedia.org/wiki/Playing_card
Our own research (8)
  1. EsoTerrier, Cardology research, 9 October 2026: the rules checked against Richmond and published examples, the card art and the legal notes.
  2. EsoTerrier, research on the name “Cardology”, October 2026: trade marks, dictionaries, books and apps.
  3. EsoTerrier, Cardology texts, 11 October 2026: the tradition card by card from Richmond, and our replacement texts.
  4. EsoTerrier, Cardology validation, 12 October 2026: the engine against an independent program, Richmond's day-card rule run from the scan, and other tools.
  5. EsoTerrier calculation engine, the Cardology service and its tests.
  6. EsoTerrier, the Cardology engine documentation.
  7. EsoTerrier, the old Cardology page (July 2026, replaced October 2026).
  8. EsoTerrier, issue records of the Cardology rebuild (the old card pages, the validation findings, the suit attributes and the name).

By EsoTerrier. Written with AI assistance from our research and checked against its sources; last revised 19 October 2026. How we write these pages.

First published ; last revised . Corrections: support@esoterrier.com.

"Cardology" is used here as the common name of the playing-card birth-card practice set out by Olney H. Richmond (1893) and popularised by Robert Lee Camp; CARDOLOGY is a registered trade mark of Scene the Light Entertainment LLC (playing cards) and of Cardology Ltd (greeting cards). EsoTerrier is not affiliated with, licensed or endorsed by them or by Robert Lee Camp.