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From H. B. Dobell 6 October 1871
Summary
Asks CD’s opinion of his suggestion that a distinctive mark of species may be the duration of pregnancy, incubation, or germination.
Author: | Horace Benge Dobell |
Addressee: | Charles Robert Darwin |
Date: | 6 Oct 1871 |
Classmark: | DAR 162: 191 |
Letter no: | DCP-LETT-7989 |