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To W. D. Fox 18 June [1860]
Summary
Has WDF ever observed musk ducks laying eggs in high places? The case bears on retention of aboriginal habits.
Also wants data on period of gestation of dog breeds. [See Variation 1: 30.]
| Author: | Charles Robert Darwin |
| Addressee: | William Darwin Fox |
| Date: | 18 June [1860] |
| Classmark: | Christ’s College Library, Cambridge (MS 53 Fox 129) |
| Letter no: | DCP-LETT-2836 |
