Hi Dietmar, maybe this is Buffalo Hump, but according to Joe Starita's "The Dull Knife of Pine Ridge" (and the pictures in this book) this also could be George Dull Knife (1875 - 1955 ). George was the youngest son and last child of Dull Knife (ca. 1810 - 1883) and his wife Short One. George lived on Pine Ridge in the Yellow Bear camp with the Poor Bear family. In Starita's book is only little information on Buffalo Hump, although Dull Knife family members worked with Starita. Did Buffalo Hump also live on Pine Ridge or did he live on the Northern Cheyenne Reservation?
I think, this photograph shows Buffalo Hump, before or around 1900. Buffalo Hump was living at the Tongue River area since 1879. In November of that year, the survivors of the Fort Robinson Outbreak ( January 9, 1879 ) were eventually allowed to return to Montana, near Fort Keogh, inclusive of Chief Dull Knife and his son Buffalo Hump. Chief Dull Knife died in 1883 at his son Bull Hump's home in Montana .
It seems, in 1930 was created a photograph of Buffalo Hump by Thomas M. Galey That photograph is titled :
Old Bull or Buffalo Hump, Age 82, son of Dull Knife and his wife 02 Sep 1930 ( SIRIS )