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To J. D. Hooker   25 [August 1863]

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Summary

CD’s illness: he is vomiting "vegetable" cells.

Dutrochet has published the best of CD’s observations on tendrils [see Climbing plants, p. 1 n.].

Lyell has found Joshua Trimmer’s Arctic shells on Moel Tryfan.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  25 [Aug 1863]
Classmark:  DAR 115: 204
Letter no:  DCP-LETT-4274

To Hugh Falconer   [25–6 August 1863]

Summary

Thanks for information about Pliocene mammal. Interested in relating process of formation to duration of the species. Oswald Heer’s view that species suddenly formed surely false.

Bad summer with much sickness. Going to Malvern [for water-cure] for a month.

Muddled over phyllotaxy and made out nothing.

Author:  Charles Robert Darwin
Addressee:  Hugh Falconer
Date:  [25–6 Aug 1863]
Classmark:  DAR 144: 32
Letter no:  DCP-LETT-4277
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