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1 turtle-head drawing (6 x 4 cm.)Repository: Ernst Mayr Library, Museum of Comparative Zoology, Harvard UniversityCall number: bAg 168.60.10 (24)g
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1 turtle drawing (11 x 23 cm.)Repository: Ernst Mayr Library, Museum of Comparative Zoology, Harvard UniversityCall number: bAg 168.60.10 (22)a
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1 turtle drawing (13 x 23 cm.)Repository: Ernst Mayr Library, Museum of Comparative Zoology, Harvard UniversityCall number: bAg 168.60.10 (22)h
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1 turtle drawing (12 x 23 cm.)Repository: Ernst Mayr Library, Museum of Comparative Zoology, Harvard UniversityCall number: bAg 168.60.10 (22)g
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1 turtle-head drawing (4 x 10 cm.)Repository: Ernst Mayr Library, Museum of Comparative Zoology, Harvard UniversityCall number: bAg 168.60.10 (22)d
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1 turtle drawing (8 x 20 cm.)Repository: Ernst Mayr Library, Museum of Comparative Zoology, Harvard UniversityCall number: bAg 168.60.10 (22)i
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1 turtle drawing (8 x 20 cm.)Repository: Ernst Mayr Library, Museum of Comparative Zoology, Harvard UniversityCall number: bAg 168.60.10 (22)b
