Given the date and signature style, this would appear to be a Pueblo man, probably from Taos. However, a monotype issued around 1900 and displayed in Sheridan, WY that fall was titled Big Nose, Cheyenne Chief.  He was noted as having the last name of Mower and coming from Oklahoma, so Sharp probably posed him in Taos in 1898 as the Southern Cheyenne visited the Pueblo annually each fall.