| Timothy H. O'Sullivan No. 4, Sierra Nevada, near Mono Lake, Eastern California [Geological Exploration Fortieth Parallel, No. 1] 1868, April (taken) 1872 (publication) Albumen print, from wet collodion glass negative, on printed mount Bibliothèque Nationale de France, Département des Estampes et de la Photographie Département Société de Géographie, GR FOL-SG D7-421 (1 RES), Identifier: ark:/12148/btv1b530847195, 6 of 52 LL/87865
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