Wow. These are so similar. The only difference I can see are their jackets - these white patches(?)
The Smithsonian wrote this regarding what they had for identification:
"Photo 792 (Little Crow, Jr.) which is marked 'same as 791', meaning a picture of Little Crow"
"Photograph (black and white) from an album; a studio portrait of The Hawk That Hunts Walking (Tshi-tan Wa-Ku-Wa Ma-Ni), a Mdewakanton Dakota Chief, seated wearing a jacket and shirt, a feather headdress, and a blanket wrapped around his waist; his hair is in two braids, and he is holding a pouch and a piece of rolled fabric; St Paul, United States of America. Albumen print"