Prior to his association with Disney, Van Horn drew and wrote the black-and-white comic book
Nervous Rex for
Blackthorne Publishing. Focusing on the misadventures of a small, non-violent tyrannosaurus, the series ran for ten issues, from 1985 to 1987. Afterward, also for Blackthorne, he drew and wrote a short-lived superhero parody comic called "Possibleman," which ran for two issues. In the first years of his career as a Disney Comics artist William often worked with
John Lustig on the stories. In 1994 he did the art for
Carl Barks' final script,
Horsing around with History, which was released in
Uncle Scrooge Adventures #33 (October 1994). Here is a list of characters William Van Horn created for the Duck universe: • Baron Itzy Bitzy – a whistling flea that Scrooge has. •
Rumpus McFowl – Scrooge's half brother who at first was believed to be Scrooge's cousin. •
Woimly Filcher – an enemy of Donald Duck and his nephews. He often draws a small fly or mosquito flying around his comics. == Reprints ==