Tsitsistas/So'taeo'o (Cheyenne) quilled horse mask, mid-1800s. Montana. Porcupine quills, hawk feathers, brass buttons, seed beads, wool cloth, hide, sinew and cotton thread. (1/4443).
Tsitsistas/So'taeo'o (Cheyenne) quilled horse mask
Smithsonian's National Museum of the American Indian.