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To Susan Darwin 23 April 1835
Summary
His trip across the Andes and back was his most successful excursion: can clearly demonstate that the western part of the double line of mountains is much older, with fossil shells at 12000ft; the eastern line may be as modern as the Patagonian plains. If proved, this is an important fact in the theory of the formation of the world. Has found petrified trees.
| Author: | Charles Robert Darwin |
| Addressee: | Susan Elizabeth Darwin |
| Date: | 23 Apr 1835 |
| Classmark: | DAR 223 |
| Letter no: | DCP-LETT-275 |
To Susan Darwin 3 [September] 1835
Summary
Living quietly on the ship and eating good food has been good for him. He longs for home. Peru is in a miserable state.
| Author: | Charles Robert Darwin |
| Addressee: | Susan Elizabeth Darwin |
| Date: | 3 [Sept] 1835 |
| Classmark: | DAR 223 |
| Letter no: | DCP-LETT-286 |
