a black and white photo of a cliff

Ancient Ruins in the Cañon de Chelle, N.M. In a niche 50 feet above present Cañon bed. Date: 1873 Artist: Timothy O’Sullivan American, born Ireland, 1840–1882 https://www.artic.edu/artworks/140416/ancient-ruins-in-the-canon-de-chelle-n-m-in-a-niche-50-feet-above-present-canon-bed