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From J. J. Weir   [before 17] October 1868

Summary

Both sexes of Crossoptilon auritum (eared pheasant) obtained the red cheeks the first year.

Coloration of the linnet.

Author:  John Jenner Weir
Addressee:  Charles Robert Darwin
Date:  [before 17] Oct 1868
Classmark:  DAR 86: A36, 53; DAR 84.1: 139
Letter no:  DCP-LETT-6421

To J. J. Weir   17 October 1868

Summary

Enjoyed JJW’s visit.

Interested in changes in plumage of pheasants.

Still at work on sexual selection in birds.

Author:  Charles Robert Darwin
Addressee:  John Jenner Weir
Date:  17 Oct 1868
Classmark:  DAR 148: 320
Letter no:  DCP-LETT-6422

From W. S. Dallas   19 October 1868

Summary

Thanks CD for his promise of support and his flattering opinion of his qualifications for the position of Assistant Secretary of the Geological Society.

Author:  William Sweetland Dallas
Addressee:  Charles Robert Darwin
Date:  19 Oct 1868
Classmark:  DAR 162: 24
Letter no:  DCP-LETT-6423

To John Tyndall   20 October 1868

Summary

Invites JT to come to Down with the Asa Grays and Hookers.

Author:  Charles Robert Darwin
Addressee:  John Tyndall
Date:  20 Oct 1868
Classmark:  DAR 261.8: 6 (EH: 88205944)
Letter no:  DCP-LETT-6424

From Karl von Scherzer   20 October 1868

Summary

Describes departure of expedition to China, Japan, and South America.

Copy of CD’s queries provided to expedition.

Invites CD to make suggestions for scientific work to be carried out.

Author:  Karl von Scherzer
Addressee:  Charles Robert Darwin
Date:  20 Oct 1868
Classmark:  DAR 177: 50
Letter no:  DCP-LETT-6425

To W. D. Fox   21 October [1868]

Summary

Reminds WDF to write about the "great magpie marriage". Sexual selection an "everlasting subject".

News of his children.

Asks for information on instances of sexual preference in animals and data on numbers of males and females born in various domesticated species.

Author:  Charles Robert Darwin
Addressee:  William Darwin Fox
Date:  21 Oct [1868]
Classmark:  Christ’s College Library, Cambridge (MS 53 Fox 149); DAR 266
Letter no:  DCP-LETT-6426

To August Weismann   22 October 1868

Summary

Fears copy of AW’s publication [Über die Berechtigung der Darwin’schen Theorie (1868)] lost in mail. Asks for another.

Glad AW approves of his work

and objects to Nägeli’s law of perfection.

Thinks Moritz Wagner overrates necessity for emigration and isolation.

Author:  Charles Robert Darwin
Addressee:  Leopold Friedrich August (August) Weismann
Date:  22 Oct 1868
Classmark:  DAR 148: 341
Letter no:  DCP-LETT-6427

From J. P. M. Weale   23 October 1868

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Summary

Describes Lappago aleina, a species of South African grass,

and reports his observations on locusts and their feeding habits.

Author:  James Philip Mansel Weale
Addressee:  Charles Robert Darwin
Date:  23 Oct 1868
Classmark:  DAR 46.1: 93a–94a
Letter no:  DCP-LETT-6428

To Karl von Scherzer   25 October 1868

Summary

Thanks KvS for information about expression.

Author:  Charles Robert Darwin
Addressee:  Karl von Scherzer
Date:  25 Oct 1868
Classmark:  American Philosophical Society (Mss.B.D25.356)
Letter no:  DCP-LETT-6429

To G. H. K. Thwaites   26 October [1868]

Summary

Encloses Queries about expression.

Author:  Charles Robert Darwin
Addressee:  George Henry Kendrick Thwaites
Date:  26 Oct [1868]
Classmark:  American Philosophical Society (Mss.B.D25.335)
Letter no:  DCP-LETT-6431

From John Price   28 October 1868

Summary

Congratulates CD on success at Cambridge [of George Darwin].

Would like CD to study the anomalous Cardamine pratensis.

Author:  John Price
Addressee:  Charles Robert Darwin
Date:  28 Oct 1868
Classmark:  DAR 174: 75
Letter no:  DCP-LETT-6434

From W. D. Fox   29 October [1868]

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Summary

Thanks CD for a recent letter.

Reports on his health, which has been bad for 12 months.

Sends extracts of works on domestication.

Discusses the pairing of various birds; comments on the pugnacity of partridges, pheasants, male guinea-fowl, and peacocks.

Gives proportions of sexes in pheasants.

Author:  William Darwin Fox
Addressee:  Charles Robert Darwin
Date:  29 Oct [1868]
Classmark:  DAR 164: 189; DAR 193: 112; DAR 83: 187, DAR 84.1: 128–30, DAR 86: A87–9
Letter no:  DCP-LETT-6436

To B. D. Walsh   31 October 1868

Summary

Thanks BDW for extracts about "drumming" [of male Cicada to attract females].

Asa Gray and Hooker doubt that 13–year and 17–year Cicada forms should be considered distinct species. CD is inclined to agree with them.

Suggests observations be made of ratio of females to males in the rarer form.

Author:  Charles Robert Darwin
Addressee:  Benjamin Dann Walsh
Date:  31 Oct 1868
Classmark:  Field Museum of Natural History, Chicago (Walsh 16)
Letter no:  DCP-LETT-6437

To Sven Nilsson   31 October [1868]

Summary

Thanks SN for the reference about the reindeer, received via Hooker.

CD wishes to ascertain whether there is any relation between the period of development of a character and its transmission to one sex alone.

Author:  Charles Robert Darwin
Addressee:  Sven Nilsson
Date:  31 Oct [1868]
Classmark:  Lund University Library Special Collections (Sven Nilsson papers)
Letter no:  DCP-LETT-6438

From Fritz Müller   31 October 1868

Summary

Writes on various observations and discoveries on dimorphic and trimorphic plants.

Author:  Johann Friedrich Theodor (Fritz) Müller
Addressee:  Charles Robert Darwin
Date:  31 Oct 1868
Classmark:  DAR 142: 98, 103
Letter no:  DCP-LETT-6439

From J. D. Caton   2 [October] 1868

Summary

Observations on lateral spots on coats of two specimens of deer. PS on habits of wild and domestic turkeys.

Author:  John Dean Caton
Addressee:  Charles Robert Darwin
Date:  2 [Oct] 1868
Classmark:  DAR 83: 167–9, DAR 161: 125
Letter no:  DCP-LETT-6488

From G. R. Crotch   [after 5 October 1868]

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Summary

Note identifying insects and remarking on stridulation.

Author:  George Robert Crotch
Addressee:  Charles Robert Darwin
Date:  [after 5 Oct 1868]
Classmark:  DAR 81: 173
Letter no:  DCP-LETT-6529

From G. R. Crotch   [after 16 October 1868]

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Summary

Lists stridulating organs of various Coleoptera.

Author:  George Robert Crotch
Addressee:  Charles Robert Darwin
Date:  [after 16 Oct 1868]
Classmark:  DAR 81: 124
Letter no:  DCP-LETT-6530

From Asa Gray   11 October [1868]

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Summary

Wants seeds of Passiflora gracilis.

Author:  Asa Gray
Addressee:  Charles Robert Darwin
Date:  11 Oct [1868]
Classmark:  DAR 165: 170
Letter no:  DCP-LETT-6931

From T. H. Farrer   26 October 1868

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Summary

Delighted with mechanisms of Salvia and Viola. How can anyone who compares structure of Viola cornuta and common violet still suppose them to be separate creations?

Author:  Thomas Henry Farrer, 1st baronet and 1st Baron Farrer
Addressee:  Charles Robert Darwin
Date:  26 Oct 1868
Classmark:  DAR 164: 47
Letter no:  DCP-LETT-6432
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