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1860-1869::1868::03 in date 
Weir, J. J. in correspondent 
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DCP-LETT-5964

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
[before 3] Mar 1868
Source of text:
DAR 84.1: 51–2 and DAR 82: A107–8
Summary:

Aggressive behaviour of a bullfinch toward new arrival in JJW’s aviary.

Sexual differences in goldfinches: size of beaks.

Sexual selection in Lepidoptera.

Thinks Dr Alex Wallace’s observations on Bombyx not conclusive in proving that no preference is shown by females.

Contributor:
Darwin Correspondence Project

DCP-LETT-5985

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
[before 5] Mar 1868
Source of text:
DAR 82: A109–12
Summary:

Does not think females give preference to any males. Coloration, pugnacity; cases of use of colour in struggle for existence. [see Descent 1: 395.]

Contributor:
Darwin Correspondence Project
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DCP-LETT-5986

From:
Charles Robert Darwin
To:
John Jenner Weir
Date:
[6 Mar 1868]
Source of text:
American Philosophical Society (Mss.B.D25.348)
Summary:

Discusses beaks and relative numbers of the sexes of goldfinches.

Comments on sexual selection among butterflies.

Mentions Kerguelen moth collected by Hooker.

Comments on JJW’s observations on coloured birds.

Contributor:
Darwin Correspondence Project

DCP-LETT-5995

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
7 Mar 1868
Source of text:
DAR 86: A21–4
Summary:

Various facts about birds: pairing, finding new mates, protective coloration, polygamy, sexual differences.

Contributor:
Darwin Correspondence Project
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DCP-LETT-6005

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
11 Mar 1868
Source of text:
DAR 84.1: 53–6
Summary:

Courtship of goldfinches. Male display. [See Descent 2: 95.]

Contributor:
Darwin Correspondence Project
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DCP-LETT-6009

From:
Charles Robert Darwin
To:
John Jenner Weir
Date:
13 Mar [1868]
Source of text:
The British Library (Egerton MS 2952: 8–10)
Summary:

Thanks for facts about birds displaying plumage during courtship; "for Butterflies I must trust to analogy altogether in regard to sexual selection".

Invites JJW to visit in summer.

Contributor:
Darwin Correspondence Project

DCP-LETT-6016

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
16 Mar 1868
Source of text:
DAR 84.1: 57–60
Summary:

Sexual selection of pigeons, ducks;

polygamous birds.

Contributor:
Darwin Correspondence Project
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DCP-LETT-6038

From:
Charles Robert Darwin
To:
John Jenner Weir
Date:
22 Mar [1868]
Source of text:
Private collection
Summary:

Glad to hear about pigeons. Did not know some birds could win affections of females more than others, except among peacocks.

Comments on polygamy in birds.

Discusses sex ratios among birds.

Contributor:
Darwin Correspondence Project

DCP-LETT-6041

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
23 Mar 1868
Source of text:
DAR 84.1: 61–4
Summary:

Relates a variety of facts about sexual selection in birds. [See Descent 2: 104–5.]

Contributor:
Darwin Correspondence Project
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DCP-LETT-6046

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
24 Mar 1868
Source of text:
DAR 84.1: 65–8
Summary:

Experiments to test Wallace’s theory that brightly coloured caterpillars are rejected by birds. [See Descent 1: 417.]

Contributor:
Darwin Correspondence Project
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DCP-LETT-6056

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
[26] Mar 1868
Source of text:
DAR 86: C5–9
Summary:

Proportions of sexes in birds as reported by bird-catchers.

Contributor:
Darwin Correspondence Project
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DCP-LETT-6059

From:
Charles Robert Darwin
To:
John Jenner Weir
Date:
27 Mar [1868]
Source of text:
Linnean Society of London (Quentin Keynes Collection)
Summary:

Thanks for information [about sex ratios] received from bird-catchers.

"Can you form any theory about all the many cases which you have given me and others which have been published, of when one pair is killed, another soon appearing?"

Facts about gay-coloured caterpillars very satisfactory.

Comments on Pangenesis.

Contributor:
Darwin Correspondence Project

DCP-LETT-6074

From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
31 Mar 1868
Source of text:
DAR 46.1: 98–101, DAR 84.1: 69–70
Summary:

Sexual behaviour of chaffinches.

Numbers of female linnets in September.

His experiments on brightly coloured larvae [as food], testing A. R. Wallace’s theory.

His observations of a rookery make him wonder whether it may not be more difficult than we think for birds to pair.

Contributor:
Darwin Correspondence Project
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