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DCP-LETT-6120

From:
Charles Robert Darwin
To:
Henry Walter Bates
Date:
15 Apr [1868]
Source of text:
Cleveland Health Sciences Library (Robert M. Stecher collection)
Summary:

CD has questions related to colour differences in the sexes of butterflies, especially in relation to HWB’s paper ["On variation in sexes of Argynnis diana", Proc. Entomol. Soc. Philadelphia 4 (1865): 204–7].

Mentions that his MS on Lepidoptera [for Descent] is longer than he intended and the information is four-fifths owed to HWB.

Contributor:
Darwin Correspondence Project
Text Online

WCP1899

From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
15 April [1868]
Source of text:
  • British Library, The: BL Add. 46434 ff. 133-135
  • Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 1. London & New York: Cassell & Co. [pp. 212-214]
Summary:

No summary available.

Contributor:
Alfred Russel Wallace Correspondence Project
Text Online

FL-1170

From:
Darwin, H. E.; Darwin, Emma
To:
Darwin, G. H.
Date:
15 [April 1868]
Source of text:
DAR 245: 288
Summary:

No summary available.

Contributor:
Darwin Family Letters

DCP-LETT-6122

From:
William Erasmus Darwin
To:
Charles Robert Darwin
Date:
[15 Apr 1868]
Source of text:
DAR 162: 84
Summary:

Gives details of the subjects on whom Langstaff made his observations on crying. Langstaff has not seen the platysma contract under chloroform.

Contributor:
Darwin Correspondence Project

DCP-LETT-6123

From:
Charles Robert Darwin
To:
Henry Doubleday
Date:
15 Apr [1868]
Source of text:
DAR 82: 121-2
Summary:

Submits lists of insects [missing] for correspondent to check whether brightly coloured. Wants to determine whether there is any relation between bright colouring, whether in both sexes or one alone, and an unequal number of males and females.

Contributor:
Darwin Correspondence Project
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DCP-LETT-6121

From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
15 Apr [1868]
Source of text:
The British Library (Add MS 46434: 133–5)
Summary:

Admires ARW’s "Theory of birds’ nests" [J. Travel & Nat. Hist. 1 (1868): 73].

Discusses their respective views on birds’ nests, sexual selection, and protection.

Asks why, if brilliant colours of female butterflies are result of protective mimicry, do not males become equally brilliant? CD believes variation in females alone accounts for it, rather than protection.

Contributor:
Darwin Correspondence Project

Herschel2603

From:
William Selwyn
To:
Sir John Herschel
Date:
[15 April 1868]
Source of text:
RS:HS 15.500
Summary:

Is graphically charting the sun and planets to compare them. Explains the lines and positions of bodies in his diagrams.

Contributor:
John Herschel Project
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