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To G. H. Darwin [9 December 1868]
Summary
Asks GHD to look in William Thomson’s book [W. Thomson and P. G. Tait, Treatise on natural philosophy, vol. 1 (1867)] to see how many million years ago Thomson says earth’s crust solidified. CD is troubled by "brevity of the world", because pre-Silurian creatures must have lived during endless ages "else my views wd be wrong, which is impossible – Q.E.D.".
| Author: | Charles Robert Darwin |
| Addressee: | George Howard Darwin |
| Date: | [9 Dec 1868] |
| Classmark: | DAR 210.1: 6 |
| Letter no: | DCP-LETT-6496 |
Addressee
| Darwin, G. H. | (1) |
Correspondent
| Darwin, C. R. | |
| Darwin, G. H. | (1) |
