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To Ferdinand Vandeveer Hayden 2 May [1870]
Summary
Thanks for copies of FVH’s "Preliminary field report [of the U. S. Geological Survey] of Colorado and New Mexico" [Am. J. Sci. 49 (1870): 258–63] and Geological report [of the exploration] of the Yellowstone [and Missouri] River[s under the direction of Captain W. F. Reynolds (1869)].
| Author: | Charles Robert Darwin |
| Addressee: | Ferdinand Vandeveer Hayden |
| Date: | 2 May [1870] |
| Classmark: | Smithsonian Libraries and Archives (Record Unit 7177, Image No. SIA2016-009764) |
| Letter no: | DCP-LETT-7178 |
From F. V. Hayden 14 June 1870
Summary
Sends maps of U. S. Far West for CD to follow explorations.
| Author: | Ferdinand Vandeveer Hayden |
| Addressee: | Charles Robert Darwin |
| Date: | 14 June 1870 |
| Classmark: | DAR 166: 123 |
| Letter no: | DCP-LETT-7232 |
