From Charles Lyell 1 March 1866
Summary
Feels sure that at times the globe must have been superficially cooler. Believes CD will turn out right with regard to migration across the equator via mountain chains, while the tropical heat of certain lowlands was retained.
| Author: | Charles Lyell, 1st baronet |
| Addressee: | Charles Robert Darwin |
| Date: | 1 Mar 1866 |
| Classmark: | DAR 91: 89–90 |
| Letter no: | DCP-LETT-5024 |
From Charles Lyell 5 March 1866
Summary
Surprised at Hooker’s introducing "so organic a change as a deviation in the axis of the planet" to explain the cold of the Glacial Period.
| Author: | Charles Lyell, 1st baronet |
| Addressee: | Charles Robert Darwin |
| Date: | 5 Mar 1866 |
| Classmark: | ML 2: 158 |
| Letter no: | DCP-LETT-5027 |
From Charles Lyell 10 March 1866
Summary
Comments on cool-period MS. Still believes geographical changes principal cause of former changes of climate.
| Author: | Charles Lyell, 1st baronet |
| Addressee: | Charles Robert Darwin |
| Date: | 10 Mar 1866 |
| Classmark: | K. M. Lyell ed. 1881, 2: 408–9 |
| Letter no: | DCP-LETT-5031 |
To Charles Lyell [3 March 1866]
Summary
Has returned memorial to Chancellor of Exchequer; thanks CL for his note.
Lengthy remarks on cool period. Did not know of CL’s interest. New facts in new German and English [4th] editions of Origin will be too late for CL’s use. CD’s ten-year-old MS on cool period is available.
| Author: | Charles Robert Darwin |
| Addressee: | Charles Lyell, 1st baronet |
| Date: | [3 Mar 1866] |
| Classmark: | American Philosophical Society (Mss.B.D25.315) |
| Letter no: | DCP-LETT-5025 |
To Charles Lyell 8 March [1866]
Summary
Gives details of enclosed MS on cool period. Mentions Hooker’s opposed "axis of the earth" view. Causes of glacial period are beyond CD; "cannot believe change in land and water being more than a subsidiary agent".
| Author: | Charles Robert Darwin |
| Addressee: | Charles Lyell, 1st baronet |
| Date: | 8 Mar [1866] |
| Classmark: | American Philosophical Society (Mss.B.D25.316) |
| Letter no: | DCP-LETT-5028 |
| letter | (5) |
| Lyell, Charles | (3) |
| Darwin, C. R. | (2) |
| Darwin, C. R. | (3) |
| Lyell, Charles | (2) |
