The only authenticated photo of William Bonney, taken around 1879. “He was said to be friendly and personable at times, and it’s been said that he was as lithe as a cat. Contemporaries described him as a “neat” dresser who favored an “unadorned Mexican sombrero”. (Wikipedia) Note: the Wikimedia Commons image has been enhanced and mirrored.
Personally, I like Morris and Goscinny’s take better: Billy ends up getting his just deserts.
The Old Wolf has spoken.