Joseph Ferdinand Gould (12 September 1889 – 18 August 1957) was an American eccentric, also known as Professor Seagull.
Often homeless, he claimed to be the author of the longest book ever written, An Oral History of the Contemporary World, also known as An Oral History of Our Time or Meo Tempore.
He inspired the book Joe Gould's Secret (1965) by Joseph Mitchell, and its film adaptation (2000), and is a character in the 2009 computer game The Blackwell Convergence.