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To William Waring   6 January 1874

Summary

CD has previously received information on colours of greyhounds. Now asks whether breeders rear all puppies, and, if not, do they selectively rear more males or females?

Author:  Charles Robert Darwin
Addressee:  William Waring
Date:  6 Jan 1874
Classmark:  Kent History and Library Centre (CKS-U1906/Z/1)
Letter no:  DCP-LETT-9228

From William Waring   9 January 1874

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Summary

Breeders normally destroy weak and puny puppies in large litters, but would keep females if only one or two.

Author:  William Waring
Addressee:  Charles Robert Darwin
Date:  9 Jan 1874
Classmark:  DAR 90: 76–8
Letter no:  DCP-LETT-9235

To William Waring   12 January [1874]

Summary

CD requests WW to ask a large breeder of greyhounds whether the increase in litters requires that some puppies be destroyed. If so, is it sufficient to destroy merely the small and weak? Would this result in more males or females being destroyed?

CD once used the Field to tabulate ratios of female to male births in greyhounds (110: 100).

Author:  Charles Robert Darwin
Addressee:  William Waring
Date:  12 Jan [1874]
Classmark:  Kent History and Library Centre (CKS-U1906/Z/1)
Letter no:  DCP-LETT-9238

From William Waring   13 April 1874

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Summary

On proportion of sexes in litters of greyhounds.

Author:  William Waring
Addressee:  Charles Robert Darwin
Date:  13 Apr 1874
Classmark:  DAR 90: 44–5
Letter no:  DCP-LETT-9407

To William Waring   13 April 1874

Summary

WW’s information accords with other accounts lately received. CD had formed an erroneous opinion on the subject.

Author:  Charles Robert Darwin
Addressee:  William Waring
Date:  13 Apr 1874
Classmark:  Kent History and Library Centre (CKS-U1906/Z/1)
Letter no:  DCP-LETT-9408
Document type
letter (5)
Correspondent
Date
1874 (5)
letter