| Timothy H. O'Sullivan Tufa Domes, Pyramid Lake, Nevada 1867 Albumen print 20 x 27 cm (7 7/8 x 10 5/8 in) American Art Museum, Smithsonian Institution Museum purchase from the Charles Isaacs Collection made possible in part by the Luisita L. and Franz H. Denghausen Endowment LL/7600
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