• Darwin Archive | 'Descent of man': portfolios | 'Descent of man': first edition, 1871, and 'Insectivorous Plants' | 'Descent of man' first edition: material relating to mammals, bulk: 1867 - 1870 | Letter from [Edgar Leopold Layard] to Charles Robert Darwin; written at [Ceylon]; incomplete, 1856-09-01 - 1856-10-31 | [Edgar Leopold Layard] to Charles Robert Darwin, 1856-09-01 - 1856-10-31

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