Head of Ca?on de Chelle, Looking Down. Walls about 1200 feet in height. Timothy O'Sullivan; American, born Ireland, 1840-1882. Date: 1873. Dimensions: 20.2 x 27.7 cm (image/paper); 38.2 x 49.9 cm (album page). Albumen print, No. 16 from the album "Ge