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From H. C. Watson 3 January 1858
Summary
Discusses the ranges and distribution of varieties relative to the type species.
| Author: | Hewett Cottrell Watson |
| Addressee: | Charles Robert Darwin |
| Date: | 3 Jan 1858 |
| Classmark: | DAR 98: A19–20 |
| Letter no: | DCP-LETT-2199 |
