Events in H. P. Lovecraft's fiction

(by hrairoo via Midjourney, in the style of Dave McKean)

This is a timeline of events as they take place in the fiction of American horror author H. P. Lovecraft.

It is comprised mostly, or entirely, from the canon events established in Lovecraft's own work, and the Lovecraft Circle. It does not take from the extended Mythos. Where other writer's have contributed to he timeline, there will be a footnote that details which writer has contributed the information.

Prehistory

13 Billion B.C. ca

• The Big Bang, and creation of the universe. Possibly the beginning of the current dream of Azothoth.

Unknown (possibly 2.5 Billion B.C. ca)

• The people of K’n-yan, who reputedly brought “Tulu”, migrated to the Earth's surface when the land was fit to live on.

1 Billion B.C. ca

• The Elder Things arrive on Earth, leave tracks in Antarctica.

600 Million B.C. ca

• The Flying Polyps dominate Earth and three other solar planets.
• The Great Race from Yith mind swap with Earthian conical bodies and defeat the Flying Polyps.

300 Million B.C. ca

• The first amphibian crawls out of water.

275 Million B.C. ca

• Elder Things wage war of re-subjugation on the Shoggoths. (This happens "toward the middle of the Permian age," which William Dyer erroneously places "perhaps 150 million years ago.")

201-145 Million B.C. ca

• The Elder Things confront an invasion of the Mi-Go during the Jurassic Period.

Great Race of Yith (Pelgrane Press)

200 Million B.C. ca

• Pangea broke up.
• R’lyeh is built.
• Spawn of Cthulhu arrive, and war with the Elder Things and drive them into the sea.

150 Million B.C. ca

• Beings of widely disparate eras, including the Miskatonic professor Nathaniel Wingate Peaslee, are abducted to the archive city of the Yithians in Australia. The Flying Polyps defeat the Yithians, forcing them to permanently mindswap with the Coleopterans. (These events may have occurred considerably earlier, as Peaslee identifies 150 million years ago with "the world of the Permian or Triassic age," which is now known to have occurred some 100 million years further back.)

145 Million B.C. ca

• Elder Things build a vast city in the Mountains of Madness in the early Cretaceous to replace an even vaster one destroyed in a cataclysm.

100 Million B.C. ca

• The first human is born.

50 Million B.C. ca

• The city of Shamballah built by Lemurians in the eastern desert.

6 Million B.C. ca

• One entity from an outer moon of Jupiter mindswaps with a Yithian.

3 Million B.C. ca

• Rhan-Tegoth comes from outer space to live in the Arctic.

2.5 Million B.C. ca

• Elder Thing city in the Mountains of Madness abandoned long before the opening of the Pleistocene. Dyer places this at 500,000 years ago, but modern scientists place it much earlier.

173,148 B.C. ca

• The Year of the Red Moon, in which T’yog, high-priest of Shub-Niggurath in K'naa, attempted to confront Ghatanothoa.

124,000 B.C. ca

• The King of Lomar mindswaps with a Yithian.

78,000 B.C. ca

• Pth’thya-l’yi born in Y’ha-nthlei,

50,000 B.C. ca

• A general from South Africa mindswaps with a Yithian.

24,000 B.C. ca

• Lomar is destroyed by the Inutos.

15,000 B.C. ca

• Cimmerian chief Crom-Ya mindswaps with a Yithian.

8,000 B.C. ca

• Sarnath stands beside a lake in Mnar.

Antiquity

2775 B.C. ca

• The Pharaoh Khephren builds the Second Pyramid at Giza.

2600 B.C.

• The first stones of Stonehenge are erected; the first temple on the site of Exham Priory is built at the same time.

Nitocris

2181 B.C.

• Queen Nitokris invites her enemies to a feast and drowns them.

1805–1650 B.C. ca

• During Egypt's 14th Dynasty, the Egyptian Khephnes mindswaps with a Yithian.

200 B.C.

• Greco-Bactrian official Theodotides mindswaps with a Yithian.

138 to 78 B.C. ca

• During Sulla's reign, Roman quaestor Titus Sempronius Blaesus mindswaps with a Yithian.

43 A.D.

• Britain is conquered by the Roman Empire. The third Augustan legion makes its camp at Anchester, bringing the worship of Cybele to Exham.

410 A.D.

• In the wake of the Roman withdrawal from Britain, the Saxons invade the island, some of whom add to the temple at Exham, making it into a cult centre feared throughout the Anglo-Saxon kingdoms of the heptarchy.

Middle Ages

Abdul Alhazred

700 ca

• Abdul Alhazred flourishes.

730 ca

• The Al Azif is written at Damascus by Alhazred.

738

• Death or disappearance of Alhazred.

950

• The Al Azif is translated into Greek by Theodorus Philetas as the Necronomicon.

1095-1291 ca

• The Crusades. During this era, an ancestor of Randolph Carter is captured by Saracens and learns secrets from them.

1000

• Exham Priory is chronicled as the home of a "strange and powerful monastic order".

1050

• Greek Necronomicon burned by the Patriarch Michael.

1100s

• Alhazred biography by Ebn Khallikan.
• Florentine monk Bartolomeo Corsi mindswaps with a Yithian.

1228

• Greek Necronomicon translated into Latin by Olaus Wormius.

Exham Priory

1232

• Greek and Latin Necronomicon banned by Pope Gregory IX and put on the Index Expurgatorius.

1261

• Gilbert de la Poer is granted Exham Priory and made first Baron Exham.

1307

• A de la Poer is described as "cursed of God."

Renaissance

1400s ca

• Latin Necronomicon printed in Germany.

1500-1550 ca

• Greek Necronomicon printed in Italy.

1512

• Zamacona y Nuñez born in Spain.

1532

• Zamacona comes to New Spain.

1541

• October 13 - Zamacona finds the entrance to Kn'yan.

1558

• Elizabeth I becomes Queen of England until her death in 1603. John Dee, who translates the Necronomicon into English, becomes her astrological advisor. During Elizabeth's reign, Sir Randolph Carter, an ancestor of his 20th century namesake, studies magic.

1567

• Printed copy of the Greek Necronomicon in Italy.

1587

• Nicholas Van Kauran, ancestor of "Mad" Dan Morris, is hanged as a wizard in Wijtgaart, the Netherlands.

1598

• Jacques Roulet of Caude is condemned as a demoniac.
• Pigafetta’s Regnum Congo printed at Frankfort.

1610 ca

• Walter de la Poer murders his family and its servants and flees to Virginia.

1623

• Latin Necronomicon printed in Spain.

1610-1643 ca

• During Louis XIII's reign in France, aged Frenchman Pierre-Louis Montagny mindswaps with a Yithian.

1643

• Founding of Innsmouth.

1653-1658 ca

• During Oliver Cromwell's day, Suffolk gentleman James Woodville mindswaps with a Yithian.

Gerrit Martense

1663

• February 18/28 (Julian/Gregorian) - Joseph Curwen born in Salem Village.

1670

• Martense Mansion built by Gerrit Martense.

1686

• The Roulet family moves from France to East Greenwich, Rhode Island.

1692

• Last reported copy of the Greek Necronomicon burned in Salem.
• Keziah Mason inexplicably escapes from Salem Gaol.
• An ancestor of Richard Upton Pickman is hanged as a witch at Salem.
• Edmund Carter flees from Salem to Arkham.
• Two or three armigerous families move from Salem to Dunwich, Massachusetts.
• March - Joseph Curwen moves from Salem to Providence, Rhode Island.

1696

• The Roulets move from East Greenwich to Providence.

The Enlightenment

1720

• Simon Orne leaves Salem after his failure to age attracts attention.

Abijah Hoadley

1740

• Ezra Weeden is born.

1747

• Rev. Abijah Hoadley preaches a sermon against Satan and his imps in Dunwich.
• The van der Heyl family moves from Albany to near what is now Attica, New York, "under a curious cloud of witchcraft suspicion."

1750

• A man calling himself Jedediah Orne, claiming to be Simon's son, comes to Salem to claim Simon's property.

1760

• The van der Heyl mansion built. 1761
• Joseph Curwen builds a larger house on his property.

1763

• Shunned House built in Providence.
• Jan Martense's correspondence with friends abruptly ceases.
• March 7 - Joseph Curwen marries Eliza Tillinghast.

1765

• The explorer Sir Wade Jermyn placed in a madhouse at Huntington.
• May 7 - Ann Curwen (later renamed Ann Tillinghast) is born, Joseph Curwen's only child.

1768

• The Squire learns the secrets of the Indians who gather on the grounds of his estate every full moon.
• Captain Ebenezer Holt trades a copy of Regnum Congo that he picked up in London to an Arkham man.

1771

• Jedediah Orne leaves Salem amidst rumors.
• April 12 - Joseph Curwen is killed during a raid on his house.

1785

• Charles Dexter Ward’s great-great-grandfather Welcome Potter marries Ann Tillinghast.

19th century

1806

• The mill at the falls is built in Dunwich.

1810

• The lights seen in the otherwise abandoned Martense Mansion stop being seen, last sign of continued existence of something in the house.

1815

• Sir Robert Jermyn marries a daughter of Viscount Brightholme.

1816

• A posse raid the Martense house, and it is found to be deserted.

1817

• Eliza Tillinghast dies.

1824

• Ezra Weeden dies.

1831

• Birth of Zadok Allen in Innsmouth.

1832

• The farmer Nahum Gardner is born.

1834

• George Gammell Angell born, later professor of Semitic languages at Brown University.
• Squire Hasbrouck, an enemy of the Van Kauran family, is turned to stone in New Paltz, New York.

1839

• Bareut Picterse Van Kauran, great-grandfather of "Mad" Dan Morris, disappears from New Paltz, New York.

Friedrich Von Junzt

1840

• Death of Friedrich Von Junzt, a year after the publication of Nameless Cults.

1842

• The farmer Ammi Pierce is born.

1844

• July - Enoch Bowen, shortly after his return from Egypt, buys the Free-Will Church as a base for his Starry Wisdom Church.

1846

• Obed Marsh summons deep ones, founds Esoteric Order of Dagon. Children begin being born with Innsmouth look.

1850

• Alfred Jermyn born.

1852

• October 19 - Sir Robert Jermyn murders his three children, after killing a visitor, the explorer Samuel Seaton; Jermyn tries and fails to kill his grandson Alfred.

1860

• William Channing Webb encounters a "singular tribe or cult of degenerate Esquimaux" on the western coast of Greenland. This caste is found repeating the chant "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn."

1861

• After a long series of deaths, the Shunned House is abandoned.

1868

• Nahum Gardner's second son, Thaddeus, is born.

1870 ca

• Nathaniel Wingate Peaslee is born.

1872

• The entire van der Heyl family, along with their servants, simultaneously disappears from their house in Chorazin, New York.

Randolph Carter

1874 ca

• Randolph Carter born.

1875

• William Dyer, future professor of geology at Miskatonic University, is born.

1877

• April - Church of Starry Wisdom closes in Providence under pressure from the city government.

1878

• Death of Obed Marsh. Pththya-l’yi returns to Y’ha-nthlei.

1879

• November - The Cabot Museum of Archaeology in Boston puts on display a mummy discovered on a new Pacific island by the freighter Eridanus the previous year.

1882

• June - A meteorite falls in a small farming community west of Arkham, Massachusetts, on the property of Nahum Gardner. Over the next year and a half, plants and animals in the vicinity show increasing abnormalities, and members of the Gardner family die or disappear.

1883

• October 7 - Young Randolph Carter visits the cave known as the Snake Den.

1891

• Heaton disappears into the Binger mound, later reappearing having lost his mind.

1892

• Marshal John Willis hears the sounds of a great cavalry battle in the mound country of Oklahoma.

1893

• Reporter Edwin M. Lillibridge disappears while investigating the Church of Starry Wisdom in Providence.

1894

• October 18-19 - Juan Romero undergoes a transition.

1896

• November - A traveler in the Miskatonic Valley takes shelter in an ancient house with a well-preserved owner.

20th Century

1900s

1902

• April - Birth of Charles Dexter Ward.

Herbert West

1904

• Herbert West begins his experiments with re-animation at Miskatonic University.

1905

• Dr. Munoz dies but artificially preserves his existence.
• August 16 - Herbert West re-animates the late Dean Allan Halsey.

1907

• November 1 - New Orleans police led by Inspector John Raymond Legrasse raid a cult gathering in lagoon country, apprehending 47 followers of Cthulhu.

1908

• At the American Archaeological Society's annual meeting in St. Louis, Angell hears accounts of the Cthulhu cult from Legrasse and William Channing Webb.
• April 17 - Alonzo Typer seen for the last time in Batavia, New York.
• April 30 - Alonzo Typer writes that he is being dragged into the cellar of the van der Heyl house.
• May 14 - A Yithian mind-swaps with Nathaniel Wingate Peaslee.

1909

• Herbert West re-animates the boxer Buck Robinson.

1910s

1910

• Harry Houdini, on a visit to Egypt, is tied up and left under the pyramids.

1912

• May 1 - Lavinia Whateley is mated with Yog-Sothoth on Sentinel Hill.

Wilbur Whateley

1913

• February 2 - Wilbur Whateley and his twin are born.
• August 13 - After opening a crate containing the stuffed body of a white ape, Arthur Jermyn immolates himself.
• September 27 - Nathaniel Wingate Peaslee returns to his body.

1914

• A shipwrecked sailor has an encounter with Dagon in the Pacific.

1915

• March - Herbert West experiments on corpses at a field hospital in St. Eloi.
• June 28 - Two college professors disappear at the Binger mound.
• Nathaniel Wingate Peasle quits work due to nightmares.
• Dunwhich is struck by Earthquakes and citizens see mysterious flames coming out of the ground.

1916

• May 11 - Captain Lawton disappears into the Binger mound. Over a week later he reappears, mentally deranged and looking 40 years younger, with both feet amputated.
• July 4 - Randolph Carter, serving in the French Foreign Legion, is seriously wounded at Belloy-en-Santerre.

1917

• August 13 - German U-boat commander Karl Heinrich discovers a temple at the bottom of the Atlantic.
• Newspapers Boston Globe and Arkham Advertiser Both print articles about seven year old Wilbur Whateley's great size and linguistic abilities.
• Nathaniel Wingate Peasle begins studying medicine, anthropology, and history trying to find out what happened during his mental breakdown.

1918

• Delapore buys Exham Priory.

1919

• June 25-26 - Elihu Whipple confronts the evil of the Shunned House.
• December - Harley Warren, with the assistance of Randolph Carter, enters a crypt in Big Cypress Swamp, Florida and is never seen again.

1920s

1920

• April 11 - Ricci, Czanek and Silva visit the Terrible Old Man in Kingsport.
• Alfred Delapore dies of injuries he sustained during the First World War.

1921

• Death of Herbert West in Boston as his experiments catch up with him.
• August 5 - George Bennett and William Tobey disappear from the Martense House.
• October - Arthur Munroe dies, his face chewed off, near Maple Hill.

1922

• January - Randolph Carter's short story "The Attic Window" appears in the magazine Whispers.
• May 17 - A sea monster is caught near Gloucester by Capt. James P. Orne.
• July 20 - A storm takes the museum ship containing the body of the sea monster from Martin's Beach.
• August 8 - The sea monster's parent arrives at Martin's Beach to enact its revenge.
• December - The Festival held in Kingsport.

1923

• A Boston surveyor examining the countryside west of Arkham, destined to be flooded for a new reservoir, hears the story of the Gardner meteorite from farmer Ammi Pierce.
• July 16 - Delapore moves into Exham Priory.
• August 8 - Delapore explores the grottos below Exham Priory, and has a breakdown that leads to the death of Edward Norrys.
• Mid-October: In New York City, Dr. Munoz liquifies as the breakdown of his refrigeration equipment brings an end to his living dead state.

1924

• August 2 - Death of Old Whateley at Dunwich.
• Charles Dexter Ward travels to Paris.

Cthulhu

1925

• February 28 - Artists around the globe begin dreaming of "bizarre" things involving the Great Old One Cthulhu, and his city of R'lyeh beneath the Pacific Ocean. Earthquakes also occur throughout the world on this date.
• March 1 - Art student Henry Anthony Wilcox contacts Angell, bearing a clay bas-relief he sculpted using a recurring image in his dreams, asking the professor's advice in identifying the hieroglyphs on the statue. Meanwhile, great storm throws the Emma considerably southward off-course.
• March 22 - The Emma, en route from New Zealand to Peru, is attacked by the heavily armored steam yacht Alert; the battle leaves the crew of the Alert crew dead and Second Mate Gustaf Johansen in charge of the crew of the Emma, who commandeers their attackers' ship.
• On the night between March 22 and 23, "hysterical Levantines" mob policemen in New York. Towards the end of March, outbreaks of mania erupt throughout the world.
• March 23 - Wilcox is "stricken with an obscure sort of fever" and enters a state of delirium. The crew of the Emma (now manning the seized Alert) arrive at R'lyeh, risen from the depths, and release Cthulhu from his crypt. Most of the crew is killed, with only Johansen and William Briden are able to escape the island, and when Cthulhu takes to the sea in chase, Johansen in desperation rams the boat into the deity head, temporarily disrupting it. As Cthulhu regenerates, the Alert flees the scene.
• April 2 - "Exceptionally heavy storms and monster waves" cause the Vigilant to be driven considerably southward off-course for Sydney. Naturally, the Alert experiences this storm as well. The bizarre dreams of R'lyeh experienced by artists around the world also come to an end. Also at 3:00 P.M. on this day, "every trace of Wilcox's malady suddenly ceased" and he was left relatively unaware of the delirium he had been experiencing since the night of March 22.
• April 5 - Wilcox returns home, having been pronounced well by his physician.
• April 12 - The Alert rescued by the freighter Vigilant, bound for Sydney.
• June - Robert Suydam marries Cornelia Gerritsen.
• August - The Squire, encountered in a courtyard in Greenwich Village, displays visions of New York City's past and future.

Richard Upton Pickman

1926

• Early in the year, artist R. U. Pickman disappears from Salem with a 16th century printed Greek Necronomicon.
• Justin Geoffrey dies screaming in a madhouse after his visit to Hungary.
• August - Thomas Olney finds a way to the Strange High House.
• October 31 - The last time Lavinia Whateley is seen.
• November 23 - George Gammell Angell dies suddenly at the age of 92 after being jostled by a sailor while returning from the Newport boat.

1927

• March 1 - "Mad" Dan Morris tricks sculptor Arthur Wheeler into drinking a potion that petrifies him.
• March 16 - Rose C. Morris forces her husband to drink the potion of petrification and then drinks it herself.
• April 15 - Charles Dexter Ward resurrects Joseph Curwen from his essential salts.
• July 15 - Robert Olmstead makes his fateful visit to Innsmouth.
• November 3 - Unprecedented flooding in Vermont leads to sightings of strange bodies in the swollen rivers.

Innsmouth

1928

• February - The federal government conducts a vast series of raids and arrests in Innsmouth, with many waterfront houses deliberately burned and dynamited. A submarine discharges torpedoes into the abyss beyond Devil's Reef. Detainees taken to concentration camps, then dispersed to naval and military prisons.
• February - Walter Gilman begins to have bad dreams in the Witch-House.
• April 13 - Dr. Marinus Bicknell Willett confronts Charles Dexter Ward (really Joseph Curwen) at the Conanicut hospital and uses a formula to dispel him. Charles Dexter Ward is pronounced dead.
• May 1 - Walter Gilman found dead in the Witch-House, his heart eaten.
• July - Olmstead visits his Williamson relatives in Cleveland, and realizes that he is a descendant of Obed Marsh.
• August 3 - Wilbur Whateley killed by a watchdog at the Miskatonic Library.
• September 9 - The being known as the Dunwich Horror breaks out in Dunwich.
• September 12 - Albert Wilmarth goes to Vermont to meet his correspondent Henry Akeley. He flees the next day.
• September 14 - Henry Armitage, Warren Rice, and Francis Morgan go to Dunwich to confront the Horror.
• October 7 - Randolph Carter disappears on a visit to his ancestral home outside Arkham.

1929

• Marriage of Edward Pickman Derby and Asenath Waite.
• June - Frank Elwood graduates from Miskatonic University.

1930s

Frank Pabodie, member of the Miskatonic Expedition

1930

• September 2 - The Miskatonic Expedition sails from Boston Harbour en route to Antarctica.
• October - The Miskatonic Expedition, led by William Dyer, arrives at Antarctica.
• October - Randolph Carter returns to Arkham, having traveled through space via the Silver Key. He adopts the identity of Swami Chandraputra, wearing a turban to conceal his now-alien features. He cashes in gold bullion at Arkham’s First National Bank.
• December - Robert Olmstead begins to dream of great watery spaces and sea-bottom temples.

1931

• January 22 - Lake discovers the Mountains of Madness. The next day, the barrel-shaped fossils dubbed the Elder Things are discovered.
• January 24 - Lake party massacred.
• January 25 - Dyer party mounts investigatory and possible rescue mission to find the ill-fated Lake Party. There they discover the massacre of their colleagues, and venture into the cyclopean city where the Elder Things reside.
• February - The Miskatonic Expedition leaves Antarctica, but not before the Dyer Party discovers an even larger mountain range in the far distance. Danforth, a member of the Dyer rescue party, has visions of the horrors that dwell there and insinuates they are much worse than the Elder Things.
• March - The Witch-House is wrecked by a storm, exposing a secret room filled with bones.

1932

• The estate of Randolph Carter is settled at the home of Etienne de Marigny in New Orleans.
• April 5 - A story by Stuart Reynolds in the Boston Pillar calls attention to the Eridanus mummy at the Cabot Museum.
• August - Daniel Upton drives to Chesuncook, Maine, to retrieve Edward Pickman Derby from the town marshal. On the way back to Arkham, Derby undergoes a striking personality change.
• October - Derby kills Asenath Waite. He claims to Upton that she has gone to New York, but reveals that Asenath--or rather, Ephraim Waite in Asenath's body--has been possessing him.
• November - Randolph Carter, in the guise of Swami Chandraputra, visits the Eridanus mummy at the Cabot Museum.
• December - On December 1, the nightwatchman at the Cabot Museum is found strangled, and two dead intruders are discovered as well, one in an inexplicable mummified state.
• December - Near Christmas, Derby has a breakdown that places him in Arkham Sanitarium.

1933

• January - Ephraim Waite regains control of Derby's body.
• February - Upton finds the decaying body of Asenath Waite on his doorstep, and afterwards goes to the Arkham Sanitarium to kill Ephraim Waite in the body of Edward Derby.
• February 18 - Dr. William Minot, who supervised the dissection of the Cabot Museum mummy, is stabbed in the back and dies the next day.
• March - Wentworth Moore, taxidermist at the Cabot Museum, disappears.
• April 22 - Dr. Johnson of the Cabot Museum dies "suddenly and rather mysteriously" from heart-failure.

1934

Robert Blake

• July 10 - Nathaniel Wingate Peaslee receives a letter from Australia, detailing the discovery of ruins in the desert of the Outback. The mining engineer Robert Mackenzie is aware of Peaslee's medical case through a mutual friend, and invites him to journey out to the ruins to examine them for himself.
• December - The writer Robert Blake moves to Providence, where he will write some of his best-known stories.

1935

• March 28 - The Peaslee expedition sails from Boston en route to Australia.
• April - Toward the end of the month, Blake explores the Starry Wisdom Church in Providence.
• June 3 - The Peaslee expedition finds the ruins of Pnakotus.
• August 9 - Death of Robert Blake in Providence.
• November 12 - The decrepit van der Heyl house in Chorazin, New York, collapses in a severe gale. Alonzo Typer's diary is found there four days later.

The Future

Please Note: Anything marked as "unknown time" should be considered to be in the far future. Some of occurrences may appear before the known dates below, but will be placed after is no information about the event is established. These unknown dates may themselves be listed out of order.

2169 A.D.

• Pickman Carter uses strange means to repel the Mongol hordes from Australia.

2518 A.D.

• Australian physicist Nevil Kingston-Brown, who mindswapped with a Yithian, dies.

5000 A.D. ca

• Philosopher Yiang-Li from the cruel empire of Tsan-Chan mindswaps with a Yithian.

16,000 A.D.

• Nug-Soth, a magician of the dark conquerors, mindswaps with a Yithian.

18,000,000 A.D.

• A half-plastic denizen of the hollow interior of a trans-Plutonian planet mindswaps with a Yithian.

Unknown Time

• Following the final end of humanity, a new race of beetle-like insects arises. These are possessed by the Great Race of Yith, leaving their previous home on a planet orbiting a dark star near Taurus. Eventually, even the beetles die out, and the Yithians send their collective minds into a vegetable species living on Mercury.
• The first primitive life develops on Venus. One Venusian is among those that exchanges minds with the Great Race of Yith.
• The last inhabitants of Earth, a species of arachnids, live within the interior of the dying world.

See also

• "Lovecraft's Cosmic History" by Robert M. Price (Crypt of Cthulhu #37)

References

Note: Citations to sources beyond Lovecraft's stories reflect extrapolations beyond the dates given in the stories themselves.