Courtesy Old West Show and Auction

  The only known photograph of  William H. McCarty, alias William Bonney, alias Billy the Kid — arguably the single most famous photograph to emerge from the Wild West — will be up for public sale for the first time ever next weekend.
   And no, the young desperado in the photo doesn’t look anything like Paul Newman, Kris Kristofferson, Emilio Estevez, or any of the other actors who played the Kid in the movies. 
  Experts regard the credit card-sized tintype as the only authenticated surviving image of the Kid. It was taken around 1879, outside a saloon in Fort Sumner, New Mexico, when McCarty was barely out of his teens and already a budding cattle thief and jailbird