These are scanned images of a letter written by H. M. Sublett (grandson of Elisha Roberts) to his cousin Horace O. Hall (another grandson of Elisha) regarding the murder of two of their kinsmen, Felix and Sidney Roberts, and the wounding of a third, Noel G. Roberts. The gunfight described is also mentioned in the book Gunsmoke in the Red Lands by Joe Combs.
The four-page letter appears below: