From Edward Blyth [before 25 March 1868]
Summary
Detailed notes on secondary sexual differences in various species of birds and mammals.
| Author: | Edward Blyth |
| Addressee: | Charles Robert Darwin |
| Date: | [before 25 Mar 1868] |
| Classmark: | DAR 83: 154–5, DAR 84.1: 131–3, DAR 48: A77, DAR 84.2: 187v |
| Letter no: | DCP-LETT-6048 |
