 Consequently, he published his account of Bonney's life, "The Authentic Life of Billy, the Kid", in 1882.It was credited to Garrett, but the first fifteen chapters were a concoction of factual material mixed with fabrications, written by Roswell's postmaster, Ash Upson, an itinerant journalist.The remaining chapters, written in a more restrained style, are generally accurate, and were likely composed by Garrett himself.