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To ? 31 December [1852–3]
Summary
Responds to correspondent’s request for information about shells from the Coquimbo beds in Chile. Difficulty in deciding on age of deposits and species. Notes views of Alcide d’Orbigny.
| Author: | Charles Robert Darwin |
| Addressee: | Unidentified |
| Date: | 31 Dec [1852-3] |
| Classmark: | Houghton Library, Harvard University (Autograph File, D) |
| Letter no: | DCP-LETT-13872 |
