This is a slightly different version of Yesterday's picture. In researching John Abernathy, and his amazing wolf catching abilities, I learned that famed Indian Chief Quanah Parker had also been on the wolf hunt with Roosevelt and Abernathy. I then found this picture. If you look at the right part of the picture, you see half the face of a Native American. I believe that is Quanah Parker, but would welcome your speculation. Also on the wolf hunt was legendary oil man Burke Burnett. Burnett might be the man in the dark suit and hat.
I also found the following photograph of the same wolf hunt.
You can click on the image to get a closer look. Roosevelt is in the right of the picture. Quanah Parker might be in the dark suit and hat on the left side of the picture. Again, I welcome your speculations.