Zap Comix. Wilson needed little persuasion to contribute to Zap. Wilson began collaborating with Crumb in late 1967, and all issues of Zap comix starting with #2 contain his work. It was in Zap #2 that Wilson widely debuted his most famous character, The Checkered Demon, a portly, shirtless being generally seen wearing checkered pants. Wilson was also a frequent early contributor to another underground project, the Yellow Dog tabloid anthology. Wilson's work was featured in all three issues of The Rip Off Review of Western Culture, published in 1972. The third issue (Nov./Dec. 1972) featured an extensive interview with Wilson by Robert Follett, the publication's editorial director. Wilson was also a frequent contributor to Arcade, edited by Art Spiegelman and Bill Griffith; as well as Weirdo, Crumb's post-underground anthology published in the 1980s and early 1990s. Wilson's underground comix work was praised by such counterculture icons as William S. Burroughs and Terry Southern. Painting The Art of S. Clay Wilson, published in 2006 by Ten Speed Press, covers his prints and paintings as well as his comics work. Book Illustrations His illustrations for Burroughs' Cities of The Red Night and The Wild Boys were published in German editions by 2001 Publishing. In 1994, he began interpreting classic children's stories, illustrating Hans Christian Andersen and the Brothers Grimm, as he explained to interviewers Jon Randall and Wesley Joost: I did a children's book entitled Wilson's Andersen. I always wanted to be a children's book illustrator way back when, but I took some LSD and took a left turn graphically. We got William Burroughs to write us a little blurb on the back, but they misspelled Burroughs! How could they do that! The stories are pretty lugubrious—"The Rose Elf", for instance—where the woman is kissing the "cold blue dead lips" of her lovers' head. Later versions leave all this stuff out. Disney takes a great old story and they "bleach" it—as they used to say about music. To make it palatable and generic. These stories are supposed to scare the shit out of little kids so they'll eat all their broccoli. The stories in Wilson's Grimm (Cottage Classics, 1999) are "Snow White", "The Spirit in the Bottle", "The Valiant Little Tailor", "The Devil with the Three Gold Hairs", "Hansel and Gretel", "Bearskin" and "The Master Thief". Brain injury and later life On November 1, 2008, Wilson suffered a severe brain injury.