I have - somewhere - a better image of this. I took it from some website that claimed Sitting Bull was in it. Damned if I could find him, though.... If I can find it, I'll post it over the next day or so.
I wonder if the above photos in this thread were taken on the same occasion at Standing Rock, when Chief Justice Morrison R. Waite and his entourage visited the place. D. F. Barry at least took two photos of the event, which include a “war dance” given by the Indians to honor their guests, and which are available online at the Denver Public Library: