Description: [caption id="" align="aligncenter" width="442" caption="View of Canyon, 1873, by Timothy H. O'Sullivan, Black and white photoprint on cardboard mount, National Anthropological Archives, SPC Sw Gen NM 113605 01861700, Local Number: NAA INV 01861700."][/caption] I paid another visit to the Timothy O’Sullivan exhibition now on view at the Smithsonian American Art Museum and a