Lamont H. Young (1851–1880) was an Australian assistant geological surveyor for the New South Wales Mines Department.
The boat was found to contain five bags full of clothing, Young's books and papers, a bullet in its starboard side and some vomit.
The men were not found despite subsequent searches, rewards, government inquiries and wide media coverage.
A monument was erected at Mystery Bay in 1980 to mark the centenary of the disappearance.
The plot of Arthur Upfield's detective novel, The Mystery of Swordfish Reef, is based on Young's disappearance.