His gig at The Lark ended in 1897, whereupon he began concentrating mainly on book publication. 1900 was the date of one of his more famous volumes, The Goops and How to Be Them. His written work has been anthologized many times over the years, and can still be found in collections of American humor. He also wrote short stories in the mystery genre, but these are less well remembered. And not that it has anything to do with toons or other published material, but he also founded the San Francisco Boys Club, first of its kind in America.
Art is in the public domain.