To Charles Lyell 1 April [1862]
Summary
Explains how melting of ice in Glen Spean could have successively freed two lower cols, thus establishing the water-levels that determined the two lower shelves in Glen Roy.
Plans to read a paper to the Linnean Society ["Sexual forms of Catasetum", Collected papers 2: 63–70].
| Author: | Charles Robert Darwin |
| Addressee: | Charles Lyell, 1st baronet |
| Date: | 1 Apr [1862] |
| Classmark: | American Philosophical Society (Mss.B.D25.275) |
| Letter no: | DCP-LETT-3491 |
