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To Daniel Oliver   28 March [1863]


Nectar secretion in Edwardsia. Could the stamen protect stigma?

Sends monstrous Primula with three pistils.

Had never heard of Robert Caspary, but what DO thinks is the placenta could be a whorl of pistils without stigmas.

Author:  Charles Robert Darwin
Addressee:  Daniel Oliver
Date:  28 Mar [1863]
Letter no:  DCP-LETT-4063

From J. D. Hooker   [28 March 1863]



Evidence of tropical floras continuous since Tertiary cannot fit CD’s position on intermittent cold periods.

Agrees with CD on reversion and latency.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  [28 Mar 1863]
Classmark:  DAR 101: 121–2
Letter no:  DCP-LETT-4064

From Armand de Quatrefages   [28 March] – 11 April 1863


Continues to support, in debates at the Société d’Anthropologie, the view that variability of animals and anatomical modifications are produced by environment. Wishes to use CD’s niata cattle example from Journal of researches [2d ed., pp. 145–6].

Author:  Jean Louis Armand (Armand de Quatrefages) Quatrefages de Bréau
Addressee:  Charles Robert Darwin
Date:  [28 Mar] – 11 Apr 1863
Classmark:  DAR 175: 3
Letter no:  DCP-LETT-4082