From John Gould 10 May 1866
Summary
Gives CD genus and species names of the singular humming-bird; distressed by specific name made necessary by revised laws of nomenclature.
| Author: | John Gould |
| Addressee: | Charles Robert Darwin |
| Date: | 10 May 1866 |
| Classmark: | DAR 84.1: 20–1 |
| Letter no: | DCP-LETT-5086 |
