Ephriam wrote an excellent article for the Fort Douglas newsletter about photographer Samuel C. Mills, who accompanied Captain James H. Simpson on his 1858-59 expedition to Utah territory.
It´s not only worth of reading regarding the relatively unknown photographer, but for the photograph of Utes on the frontpage, which shows a group of Utes with their head chief Arrapene (Sinnearoach), photographed by Mills in 1859.
I found information that Arrapeen and his brother Chief Walkara are said to had been the most notorious raiders of the Utes in the 1840s, when they possibly were aided by mountain men Pegleg Smith and Joe Walker. Their horse-stealing ring reached as far as California and resulted in hundreds of horses for the Utah Utes. (see: Utes – the Mountain People by Jan Pettit) When Walkara (aka Walker) died in 1855, Arrapeen succeeded him as chief.
Unfortunately, only one of Mills' native photographs is known to have survived. I continue to search and while I found some new unpublished officer's portraits that he took, so far no further Ute images.
"A Group of Utah Indians, including Arrapene (Sinnearoach), the head chief of the tribe, and Luke, the interpreter, taken on the outskirts of Camp Floyd, looking north west towards the Oquirrah Mountains." By Samuel C. Mills and Edward Jagiello, January 1859.