| Frederick H. Evans Fr: Sec: Spine of Echinus x. 40 1887 (ca) Platinum print 4 3/4 × 4 5/8 ins (12 × 11.8 cm) (image and sheet) Philadelphia Museum of Art Purchased with funds contributed by Dorothy Norman, 1973, Accession Number: 1973-197-65 LL/71618
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