Yep, Pat Ryan (Patsy “Short Horse” Ryan, 1858-1910), an Indian artifact dealer in Omaha, Nebraska. He was sometime also a resident of Chadron, Neb. and presented his large collection of Indian relics and other stuff at the Omaha Trans-Mississippi and International Exposition in 1898.
I am assuming this will be a long-shot, but here goes...
On the LBHA Facebook site, there is the usual bickering over a tintype that showed up purporting to be a photograph of Crazy Horse. Most of those who are fairly astute in these matters dispute the claim, yet a book has been written giving all sorts of "evidence" that the photo is indeed, the famous Oglala.
As part of this whole discussion, the following photo was displayed, some people claiming the individuals depicted are the same person, while others dispute even that. I have posted the double image to see if anyone here can identify with some semblance of certainty, who these two men are.