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Lore & Background

Notable phantom islands were discovered at various points, mostly during the 19th century. Dougherty Island was first spotted in 1841 by Captain Daniel Dougherty of the James Stewart, an Irish whaler, who reported discovering it at 59°20′S 120°20′W. He described it as 5–6 miles long with a high bluff to the northeast and covered in snow. Dougherty's discovery was confirmed by Captain Keates of the Louise in 1860, giving its coordinates as 59°20′S 120°18′W, and by Captain Stannard of the Cingalese in 1886, giving the location as 59°21′S 119°7′W. The island continued to appear on maps as late as 1934. Emerald Island was first sighted by the British sealing ship Emerald, captained by William Elliot, in December 1821, and the name of the supposed island is derived from the name of this ship. It was presumed to be a small (but high and mountainous) island located at 57°30′S 162°12′E. No trace of the island was found by the 1840 United States Exploring Expedition. Although a captain visiting Port Chalmers reported seeing it sometime before 1890, a search by the Nimrod in 1909 turned up nothing. Nevertheless, it appeared on a map as late as 1987 in a desk calendar book (with atlas) published by American Express. The Royal Company's Islands were reported by some early explorers to lie southwest of Tasmania. They were first heard of before 1840, but the original report cannot be traced. Many old charts show them at 50°20′S 140°0′E or 52°20′S 143°0′E. The Nimrod Islands were first reported in 1828 by Captain Eilbeck of the ship Nimrod while sailing from Port Jackson around Cape Horn. Their reported location was east of Emerald Island and west of Dougherty Island, at approximately 56°S 158°W. Finally, Middle Island, once thought to be in the South Shetland Islands, was first sighted along with the rest of the archipelago by British mariner William Smith, on the vessel William, in 1819, although Dutch mariner Dirck Gerritsz in 1599 or Spanish Admiral Gabriel de Castilla in 1603 might have sighted the South Shetlands. Additionally, North or South American sealers might have also visited the archipelago before Smith, though who truly saw them first remains unclear.

Reader's Guide

Some phantom islands may have been purely mythical, such as the Isle of Demons near Newfoundland, which may have been based on local legends of a haunted island. The far-northern island of Thule was reported to exist by the 4th-century BC Greek explorer Pytheas, but information about its purported location was lost; explorers and geographers since have speculated that it was the Shetland Islands, Iceland, Scandinavia, or possibly nonexistent. The island of Hy-Brasil was sometimes depicted on maps west of Ireland, but all accounts of it have been fanciful. Some phantom islands arose through the faulty positioning of actual islands, or other geographical errors. Pepys Island was a misidentification of the Falkland Islands. The Baja California Peninsula and the Banks Peninsula in New Zealand each appear as islands on some early maps, but were later discovered to be attached to their mainlands. Isle Phelipeaux, an apparent duplication of Isle Royale in Lake Superior, appeared on explorers' maps for many years, and even served as a landmark for the border between the United States and the territory that would become Canada, before subsequent exploration by surveyors determined that it did not exist. Sandy Island appeared on maps of the Coral Sea beginning in the late 19th century. Purportedly, it existed between the Chesterfield Islands and Nereus Reef near New Caledonia; however, it was "undiscovered" in the 1970s. Nonetheless, it continued to be included in mapping data sets into the early 21st century, until its non-existence was re-confirmed in 2012. Other phantom islands are misidentifications of breakers, icebergs, fog banks, pumice rafts from underwater volcanoes, or optical illusions. Observed in the Weddell Sea in 1823 but never again seen, New South Greenland may have been the result of a superior mirage. Some such as Thompson Island or Bermeja may have been actual islands subsequently destroyed by volcanic explosions, earthquakes, submarine landslides, or low-lying lands such as sand banks that are no longer above water. Pactolus Bank, visited by Sir Francis Drake in 1578, may fit into this former sand bank category. In some cases, cartographers intentionally include invented geographic features in their maps, either for fraudulent purposes or to catch plagiarists.

Did You Know?

• Dougherty Island, first spotted in 1841 by Captain Daniel Dougherty, continued to appear on maps as late as 1934.
• Emerald Island, named after the British sealing ship Emerald, appeared on a map as late as 1987 in an American Express desk calendar book.
• Sandy Island was 'undiscovered' in the 1970s but continued to appear in mapping data sets until its non-existence was re-confirmed in 2012.
• Isle Phelipeaux, a phantom duplicate of Isle Royale in Lake Superior, served as a landmark for the border between the United States and Canada before surveyors determined it did not exist.
• The Royal Company's Islands were first heard of before 1840, but the original report cannot be traced.

Origins and the Anatomy of Error

Phantom islands typically trace their origins to the age of early maritime exploration, when sailors charting unknown waters could easily mistake one thing for another. A floating iceberg, a bank of fog, a raft of volcanic pumice, or even a superior mirage over open water might all be logged as solid land. In some cases the error was deliberate: cartographers would plant invented features on their maps either to defraud buyers or to trap rival mapmakers who copied their work. Other phantoms were simply misreadings of real geography. Pepys Island turned out to be a garbled identification of the Falkland Islands, while the Baja California Peninsula and New Zealand's Banks Peninsula were drawn as detached islands on early charts before surveyors confirmed they were attached to their respective continents. Isle Phelipeaux, a phantom duplicate of Isle Royale in Lake Superior, was so firmly embedded in cartographic tradition that it even served as a reference point for the border between the United States and what would become Canada, until later surveying proved it had never existed.

Notable Cases and Their Remarkable Longevity

Dougherty Island, first reported in 1841 by Captain Daniel Dougherty of the Irish whaler James Stewart, was supposedly confirmed by two other captains in 1860 and 1886, yet no such landmass ever existed. It nonetheless lingered on published charts as late as 1934. Emerald Island, named for the British sealing vessel that sighted it in December 1821, was searched for by the 1840 United States Exploring Expedition with no success, and a 1909 expedition aboard the Nimrod also turned up nothing—yet the island still appeared in an American Express desk calendar atlas in 1987. Sandy Island, placed in the Coral Sea between the Chesterfield Islands and Nereus Reef, was 'undiscovered' in the 1970s but continued to appear in digital mapping datasets well into the 21st century, with its non-existence re-confirmed in 2012. The Nimrod Islands, first reported in 1828, and the Royal Company's Islands, first heard of before 1840, similarly vanished from reality without ever being verified by any subsequent voyage.

The Cartographic Inertia That Keeps Ghosts Afloat

What makes phantom islands remarkable is not their initial appearance but their extraordinary endurance on charts. A single unverified sighting could anchor a feature to maps for generations, even centuries. The Royal Company's Islands, whose original report cannot even be traced, appeared on many old charts at various coordinates southwest of Tasmania. Sandy Island survived from the late 19th century through its 1970s 'undiscovery' and into 21st-century digital databases. Emerald Island's ghost persisted into a 1987 publication. This persistence reveals how cartographic authority operates: once a feature is printed, it gains a kind of institutional credibility that resists correction. The distinction between phantom islands and lost lands is also crucial—phantom islands are claimed to exist in the present but never did, whereas lost lands are believed to have once existed before being destroyed or swallowed by the sea.

Literary Echoes and the Mythic Dimension

The phantom island phenomenon has left a lasting mark on literature and popular imagination. Herman Melville wove the concept into Moby-Dick, where the narrator reflects on how a dead whale's floating carcass, glimpsed from a distance by a passing vessel, gets logged as 'shoals, rocks, and breakers' and causes ships to avoid the area for years. This literary nod captures the very mechanism by which phantom islands are born: a distant, ambiguous observation recorded in a ship's log and then propagated through subsequent charts. The Isle of Demons near Newfoundland, possibly rooted in local legends of a haunted island, and the far-northern Thule reported by the 4th-century BC Greek explorer Pytheas—whose location was lost and has been variously identified as Shetland, Iceland, Scandinavia, or nothing at all—show how myth and geography intertwine. Hy-Brasil, depicted west of Ireland, represents the purely fanciful end of the spectrum.