Wanamaker Store, 1913: first, second and third from left: Plenty Coups , Medicine Crow, White Man Runs Him (Crow) shaking hands with Rodman Wanamaker: Two Moons (Cheyenne) Standing fifth from right Jack Red Cloud (Oglala)
Well, it's probably a perspective trick - Jack is standing behind the others and probably that makes him look shorter. In the same way, Plenty Coups, who was (more or less) as tall as Medicine Crow, looks taller and bigger. Not sure about Wooden Leg... in other 1913 images he looks plumper and older, but for sure he was in NY when the photograph was taken...by the way, is the man standing between Two Moons and Wanamaker actually Mountain Chief (Blackfoot)?
"Don't ever tell anybody anything. If you do, you start missing everybody."