William Delisle Hay

William Delisle Hay (11 March 1853 – ) was a nineteenth-century British author and Fellow of the Royal Geographical Society from Bishopwearmouth, County Durham. He was best known for his mycological studies, writings on New Zealand, and a number of science fictional pulp novels, particularly the white supremacist and socialist "future fantasy" novel Three Hundred Years Hence; or, A Voice from Posterity.

In his mycological writings, Hay observed a national superstition against "toadstools" in Britain, coining the term "fungophobia" to describe the prejudice.

Hay's short story "The Doom of the Great City" is considered by some to be the "first modern tale of urban apocalypse", Three Hundred Years Hence (not to be mistaken with an earlier novel of the same title, by Mary Griffith) was similarly told from a future earth in which humanity lived in domed cities, and posited a socialist world, in which white people had virtually eliminated all non-white people from the world.

Works Fiction "The Doom of the Great City; Being the Narrative of a Survivor, Written A.D. 1942" (1880 short story) Three Hundred Years Hence; Or, A Voice from Posterity (1881) Blood: A Tragic Tale (1888)

Non-Fiction Brighter Britain!; Or, Settler and Maori in Northern New Zealand (1882) (available at Project Gutenberg) The South Sea Islanders and the Queensland Labour Trade: a record of voyages and experiences in the western Pacific, from 1875 to 1891 (1893) (several copies available at the Internet Archive) The Fungus-Hunter's Guide and Field Memorandum-Book (1887) (available at Google Books) An Elementary Text-Book of British Fungi (1887) (available at Internet Archive)

Lectures and appearances 20 March 1883, "Social and Commercial Aspects of New Zealand", Meetings of the Society: Foreign and Colonial Section