Indian Agent Samuel G. Colley stands in the upper left of this photo with interpreter William Simpson Smith. The white woman on the far right is thought to be Mary Todd Lincoln. The front row Indians are, left to right, War Bonnet (Cheyenne – killed at Sand Creek), Standing in the Water (Cheyenne - killed at Sand Creek), Lean Bear (Cheyenne – mistakenly killed by Colorado troops), Yellow Wolf (Kiowa). Second-row Indians are unidentified.