S. Clay Wilson (July 25,1941-) is an American underground cartoonist and central figure in the underground comix movement. Wilson is known for aggressively violent and sexually explicit panoramas of "lowlife," often depicting the wild escapades of pirates and bikers. He was an early contributor to Zap Comix, and Wilson's artistic audacity has been cited by R. Crumb as a liberating source of inspiration for Crumb's own work. Wikipedia
The definitive Wikipedia entry for S. Clay Wilson. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/S%2e_Clay_Wilson