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To Charles Lyell   20 May 1869

Summary

Cites article by David Forbes dealing with the geology of the S. American Cordillera ["Geology of Bolivia and South Peru", Q. J. Geol. Soc. Lond. 17 (1861): 7–62].

Discusses the flexures of the Cordillera, the age of the mountains, and basaltic dikes in granite areas.

Author:  Charles Robert Darwin
Addressee:  Charles Lyell, 1st baronet
Date:  20 May 1869
Classmark:  American Philosophical Society (Mss.B.D25.370)
Letter no:  DCP-LETT-6751

From Henry Maudsley   20 May 1869

Summary

He forwarded CD’s queries on the insane to James Crichton-Browne who has now answered.

Author:  Henry Maudsley
Addressee:  Charles Robert Darwin
Date:  20 May 1869
Classmark:  DAR 161: 308, 323/6–9; DAR 171: 93
Letter no:  DCP-LETT-6752

To J. J. Weir   20 May [1869]

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Summary

Asks for information about male birds migrating before females.

Author:  Charles Robert Darwin
Addressee:  John Jenner Weir
Date:  20 May [1869]
Classmark:  DAR 148: 322
Letter no:  DCP-LETT-6753

To John Wheldon   20 May [1869]

Summary

Orders two second-hand books from a dealer’s catalogue.

Author:  Charles Robert Darwin
Addressee:  John Wheldon
Date:  20 May [1869]
Classmark:  Yale University Medical Historical Library, Harvey Cushing / John Hay Whitney Medical Library (tipped into Rare Book QH9 D25 867M)
Letter no:  DCP-LETT-6753F