The poet Weldon Kees died at the age of 41. Here is all you want to know, and more!
Biography - A Short Wiki
Poet, author, jazz pianist, and artist whose best- known literary works include The Last Man and Fall Quarter. After he disappeared under mysterious circumstances in 1955, he became the subject of a book entitled Vanished Act: The Life and Art of Weldon Kees.
He grew up in Nebraska and later lived in Colorado, New York, Massachusetts, and California. He married Ann Kees in 1941.