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To Leonard Horner 14 February [1861]
Summary
Variations in nature arise from unknown causes, accidentally or spontaneously, and are preserved by natural selection if beneficial.
| Author: | Charles Robert Darwin |
| Addressee: | Leonard Horner |
| Date: | 14 Feb [1861] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-3062 |
To Leonard Horner 20 March [1861]
Summary
Comments on LH’s "Anniversary Address of the President", [Q. J. Geol. Soc. Lond. 17 (1861): xxxi–lxxii]. Notes LH’s comments on metamorphism, antiquity of man, and the Bible. Thanks him for his remarks on Origin.
| Author: | Charles Robert Darwin |
| Addressee: | Leonard Horner |
| Date: | 20 Mar [1861] |
| Classmark: | Sotheby’s (dealers) (9–10 July 2018, lot 374) |
| Letter no: | DCP-LETT-3094 |
