Pictographs in Mancos River Canyon, Ute Mountain Tribal Park, on the way to Sandal House. These Pictographs were painted by Chief Jack House, last of the traditional chiefs of the Ute Tribe. Chief Jack House was the son of Acowitz House. Acowitz was with Richard Wetherill when Cliff Palace was discovered in December of 1888. Notice that Jack House signed the painting on the horse shoulder.