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From ?   6 April 1868


Gives details of some points that occurred to him while reading Variation, including observations on horses, cattle, silkworms, and hereditary baldness and disease.

Author:  Unidentified
Addressee:  Charles Robert Darwin
Date:  6 Apr 1868
Classmark:  DAR 159: 139
Letter no:  DCP-LETT-6097

From St George Jackson Mivart   6 April 1868


Has asked gentlemen who administer chloroform to make observations [on expression?] for CD.

Author:  St George Jackson Mivart
Addressee:  Charles Robert Darwin
Date:  6 Apr 1868
Classmark:  DAR 171: 184
Letter no:  DCP-LETT-6098

From J. D. Hooker   7 April 1868



Goes to N. Wales with Huxley.

Wishes to borrow Duke of Argyll’s Reign of law.

The BAAS Presidential Address [Rep. BAAS 38 (1868): lviii–lxxv] – his unhappiness about it; history of botany requires too much reading.

Smith will supply notes on Euryale.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  7 Apr 1868
Classmark:  DAR 102: 208–9
Letter no:  DCP-LETT-6099

From W. E. Darwin   [7 April 1868]


Describes the action of facial muscles at the onset of crying as observed by Langstaff.

Author:  William Erasmus Darwin
Addressee:  Charles Robert Darwin
Date:  [7 Apr 1868]
Classmark:  DAR 162: 99
Letter no:  DCP-LETT-6100

From C. S. Bate   7 April 1868



On dentition of moles. On double teeth [see Variation 2: 391].

Difference in size of male and female Crustacea.

Author:  Charles Spence Bate
Addressee:  Charles Robert Darwin
Date:  7 Apr 1868
Classmark:  DAR 82: A67–8
Letter no:  DCP-LETT-6101

From Ernest Faivre   7 April 1868


Thanks for sending Variation.

Author:  Jean-Joseph-August-Ernest (Ernest) Faivre
Addressee:  Charles Robert Darwin
Date:  7 Apr 1868
Classmark:  DAR 164: 3
Letter no:  DCP-LETT-6102

To W. E. Darwin   8 April [1868]


Thanks C. L. Langstaff for his observations relating to expression. Has requested observations on the platysma. Discusses the actions of other facial muscles, especially during crying. [Encloses 5828.]

Author:  Charles Robert Darwin
Addressee:  William Erasmus Darwin
Date:  8 Apr [1868]
Classmark:  DAR 210.6: 124, 128
Letter no:  DCP-LETT-6103

From A. R. Wallace   8 [April] 1868


If CD is not convinced by his notes on sterility, ARW has little doubt that he is wrong. In fact he was only half-convinced by his own arguments.

Modifies his first proposition [a species varies occasionally in two directions, but owing to free inter-crossing the variations never increase] and further discusses the subject.

Encloses Berthold Seemann’s notes on flora of the Hawaiian Islands. Presence of European alpine species in Hawaiian volcanoes is a "hard nut" for geographical distribution [but see ARW’s Island life (1880), p. 323].

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  8 [Apr] 1868
Classmark:  DAR 106: B57-8
Letter no:  DCP-LETT-6104

From G. R. Gray   8 April 1868



Difference between sexes of Ibis rubra; change in plumage.

Author:  George Robert Gray
Addressee:  Charles Robert Darwin
Date:  8 Apr 1868
Classmark:  DAR 84.1: 92
Letter no:  DCP-LETT-6105

From Giovanni Canestrini   8 April 1868



Reports on Prof. Cornalia’s observations on the proportion of sexes in bees, and in healthy and sick silk moths, in nature and under domestication.

Author:  Giovanni Canestrini
Addressee:  Charles Robert Darwin
Date:  8 Apr 1868
Classmark:  DAR 86: A28–9
Letter no:  DCP-LETT-6106

From W. S. Dallas   8 April 1868


He never intended "A Lift for Darwin" as a serious title but as a way of arranging it. Lyell’s suggestion seems best to him: "Facts and Arguments For Darwin".

Author:  William Sweetland Dallas
Addressee:  Charles Robert Darwin
Date:  8 Apr 1868
Classmark:  DAR 162: 20
Letter no:  DCP-LETT-6107

From John Smith   8 April 1868



Notes the differences in seed production between cross- and self-fertilized flowers of Victoria regia.

Author:  John Smith
Addressee:  Charles Robert Darwin
Date:  8 Apr 1868
Classmark:  DAR 76: B175
Letter no:  DCP-LETT-6108

To A. R. Wallace   9 April [1868]


Warns ARW of dubious character of list of European alpine genera and species in volcanoes of Hawaii. Problems of geographical distribution in oceanic islands.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  9 Apr [1868]
Classmark:  The British Library (Add MS 46434)
Letter no:  DCP-LETT-6109

From James Samuelson   10 April 1868


Corrects errors of detail in Variation.

Author:  James Samuelson
Addressee:  Charles Robert Darwin
Date:  10 Apr 1868
Classmark:  DAR 177: 28
Letter no:  DCP-LETT-6110

From Albert Gaudry   11 April 1868


Thanks CD for copy of Variation.

CD’s work on pigeons demonstrates the close relationship between modifications in soft tissues and the hard parts, which are the only ones we possess in the fossil state.

Author:  Albert-Jean (Albert) Gaudry
Addressee:  Charles Robert Darwin
Date:  11 Apr 1868
Classmark:  DAR 165: 17
Letter no:  DCP-LETT-6111

To B. D. Walsh   13 April [1868]


BDW’s letter [6051?] and his notes are a "mine of wealth". The negative evidence is of much value. Sexual selection is a perplexing subject – finds he "must make the best of a rather bad job".

Sends copy [of Variation].

Author:  Charles Robert Darwin
Addressee:  Benjamin Dann Walsh
Date:  13 Apr [1868]
Classmark:  Field Museum of Natural History, Chicago
Letter no:  DCP-LETT-6113

To John Murray   13 April [1868]


Asks JM to send Variation to G. Boccardo in Italy.

Sends title (suggested by Lyell) for translation of Fritz Müller’s Für Darwin (which Dallas is translating). CD does not wish to go to great expense in advertising it.

Author:  Charles Robert Darwin
Addressee:  John Murray
Date:  13 Apr [1868]
Classmark:  National Library of Scotland (John Murray Archive) (Ms.42152 ff. 184–185)
Letter no:  DCP-LETT-6114

From George Henslow   13 April 1868


Thanks for Casimir de Candolle’s paper ["Théorie de l’angle unique en phyllotaxie", Arch. Sci. Phys. & Nat. 23 (1865): 199–212].

Author:  George Henslow
Addressee:  Charles Robert Darwin
Date:  13 Apr 1868
Classmark:  DAR 166: 166
Letter no:  DCP-LETT-6115

From Roland Trimen   13 April 1868



Extract from Émile Blanchard’s Metamorphoses, moeurs et instincts des insectes [1868], on attraction of males by female Lepidoptera, and possible explanation.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  13 Apr 1868
Classmark:  DAR 85: B50–1
Letter no:  DCP-LETT-6116

To Roland Trimen   14 April [1868]


Has tried using dealers’ price-lists as a guide to sex ratios in Lepidoptera; finds numerous cases in which the sexes bring different prices and in virtually all of them the males are cheaper. This seems to confirm the impression of the field collectors.

Wishes RT good luck with natural history in S. Africa.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  14 Apr [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 68)
Letter no:  DCP-LETT-6117
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