William Ambrosia Cowley was a 17th century English

English people

The English are a nation and ethnic group native to England, who speak English. The English identity is of early mediaeval origin, when they were known in Old English as the Anglecynn. England is now a country of the United Kingdom, and the majority of English people in England are British Citizens...

 buccaneer

Buccaneer

The buccaneers were privateers who attacked Spanish shipping in the Caribbean Sea during the late 17th century.The term buccaneer is now used generally as a synonym for pirate...

 who surveyed the Galápagos Islands

Galápagos Islands

The Galápagos Islands are an archipelago of volcanic islands distributed around the equator in the Pacific Ocean, west of continental Ecuador, of which they are a part.The Galápagos Islands and its surrounding waters form an Ecuadorian province, a national park, and a...

 during his circumnavigation of the world, and published the first chart of the islands in 1684. In his diary he reported the discovery of the mythical Pepys Island

Pepys Island

Pepys Island is a phantom island, said to lie about north of the Falkland Islands in 47°S. It was first described by Ambrose Cowley in 1684, presumably mistaking the coordinates of one of the Falkland Islands, and named by him for Samuel Pepys, Secretary of the Admiralty. Other observers on the...

, allegedly situated north of the Falkland Islands

Falkland Islands

The Falkland Islands are an archipelago in the South Atlantic Ocean, located about from the coast of mainland South America. The archipelago consists of East Falkland, West Falkland and 776 lesser islands. The capital, Stanley, is on East Falkland...

, prompting a number of mariners to look in vain for the nonexistent land.