| John Dillwyn Llewelyn [Thereza Dillwyn Llewelyn with Her Microscope] 1854 (ca) Salted paper print, from glass negative 23.5 x 18.7 cm (9 1/4 x 7 3/8 ins) Metropolitan Museum of Art Robert O. Dougan Collection, Gift of Warner Communications Inc., 1981, Accession Number: 1981.1229.5 LL/40466
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