Hunkpapa Lakota Sioux holy man (circa 1831–1890) known for his steadfast opposition to the intrusion of the US government into Sioux lands. Fleeing to Canada following the Battle of Little Big Horn, he later returned to the US and toured with Buffalo Bill's Wild West Show. Fearing his growing influence, government agents fatally shot him during an arrest attempt at Standing Rock Agency on December 15, 1890. Bold ink signature, "Sitting Bull,” on an off-white 3.5 x 2.5 sheet. In fine condition. Encapsulated and graded by PSA/DNA as "NM-MT 8." Sitting Bull's autograph is rare and highly sought-after in any form, and this is a particularly fine exemplar.