Freeman Bibliographical Database
| Identifier: | F1911 |
| Date: | 1884.09.00 |
| Concise reference: | Darwin, C. R. 1884. [Extract from a 1881 letter of Darwin and his unpublished notes]. In Romanes, G. J., The Darwinian theory of instinct. The Nineteenth Century no. 91 (September): 434-450. |
| Detailed reference: | (John van Wyhe) |