Human survivor of the destruction of Earth. Also an amateur banjo player and composer. From Venus on the Half Shell by fictional science fiction author Kilgore Trout. A recurring character invented by Kurt Vonnegut, fellow author Philip José Farmer thought it'd be fun to write one of Trout's novels that only existed as a title and short excerpt in God Bless You, Mr. Rosewater (1965).
It was first published in the December 1974 issue of Fantasy & Science Fiction.
Wagstaff's favorite poet he composes music for is Count Hippolyt Bruga (really Jules Ganz), who comes from the 1926 novel Count Bruga by Ben Hecht.
He always carries an atomic-powered electrical banjo.