The Maracot Deep is a short 1929 novel by Arthur Conan Doyle about the discovery of a sunken city of Atlantis by a team of explorers led by Professor Maracot. He is accompanied by Cyrus Headley, a young research zoologist and Bill Scanlan, an expert mechanic working with an iron works in Philadelphia who is in charge of the construction of the submersible which the team takes to the bottom of the Atlantic.