in 1890, native american historian charles alexander eastman recorded his first meeting with chief blue horse at pine ridge agency, south dakota. eastman reported chief blue horse was his "first caller" at the pine ridge agency and chief "emeritus" of the wágluȟe band. "he softly opened the door and stepped in without knocking, in characteristic indian fashion. after greeting me in sioux, he promptly produced his credentials, which consisted of well-worn papers that had been given him by various high military officers, from general william selby harney to general george crook, and were dated 1854 to 1877. the old man wanted nothing so much as an audience, and the tales of his exploits served to pass the evening." eastman recorded that "blue horse had been, as he claimed, a friend to the white man, for he was one of the first sioux u.s. army indian scouts, and also one of the first to cross the ocean with buffalo bill."