To Asa Gray 15 March [1870]
Summary
The "man-essay" [Descent] is "very interesting but very difficult".
Cat-like behaviour in dogs.
Thanks for information from Louis Agassiz;
wishes he could feel he deserves what Alexander Agassiz says of him.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 15 Mar [1870] |
| Classmark: | Gray Herbarium of Harvard University (91) |
| Letter no: | DCP-LETT-7132 |
To Asa Gray 7 December 1870
Summary
Believes AG’s cases of incipient dimorphism are due to mere variability. Has found examples in Nolana and Amsinckia; believes such variation is the basis for the development of dimorphism. Was unaware of variations in Phlox.
Sensitivity of Drosera and Dionaea.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 7 Dec 1870 |
| Classmark: | Gray Herbarium of Harvard University (90) |
| Letter no: | DCP-LETT-7388 |
