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To James Croll 19 September 1868
Summary
Discusses papers by JC dealing with erosion. Comments on papers on the subject by J. B. Jukes, A. C. Ramsay, and William Whitaker. Formerly believed in power of the sea. Never fully realised the truth until reading JC’s papers.
| Author: | Charles Robert Darwin |
| Addressee: | James Croll |
| Date: | 19 Sept 1868 |
| Classmark: | DAR 143: 352 |
| Letter no: | DCP-LETT-6380 |
To James Croll 24 November 1868
Summary
Comments on glaciers in North America.
Asks if glacial periods have occurred alternately in the Northern and Southern Hemispheres. Relevant to his glacial discoveries in South America: "it would have been an immense relief to my mind if I could have assumed … this". CD wishes to discuss subject in new edition of Origin [5th].
| Author: | Charles Robert Darwin |
| Addressee: | James Croll |
| Date: | 24 Nov 1868 |
| Classmark: | DAR 143: 353 |
| Letter no: | DCP-LETT-6473 |
To James Croll 4 December [1868]
Summary
Acknowledges receipt of book and manuscript.
| Author: | Charles Robert Darwin |
| Addressee: | James Croll |
| Date: | 4 Dec [1868] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-6491 |
