It happened while Theodore Geisel was editor of the Dartmouth humor magazine, the Jack-O-Lantern:
Geisel was very proud of his position as editor. But it’s a title Geisel would lose one fateful night on campus.
“His senior year he decided to hold a party for all of the Jack-O-Lantern staff,” Pease recounted.
Geisel’s party got out of hand, thanks to a couple of unruly guests. As punishment, his name was stripped from the Jack-O-Lantern publication. But Geisel continued drawing for the magazine under pseudonyms; finally settling on Seuss.
Earlier: How did Dr. Seuss die?