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Letter 6464A

Darwin, C. R. to Gardeners' Chronicle

17 Nov 1868

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    Is interested to know whether there are differences in the period of development of horns in sheep in those breeds in which horns are common to both sexes, and in those in which horns are confined to males.


Down, Bromley, Kent

Nov. 17, 1868

I should be greatly obliged to anyone who keeps Merino sheep, or any other breed in which the ewes are hornless, or to any one who has the power of inquiring about such breeds, if he would take the trouble to inform me at what age the horns first appear in the young rams, or acquire a certain specified length, in comparison with other breeds of sheep in which both sexes possess horns. Or, to put the case more generally, is there any difference in the period of development of the horns in the breeds in which they are common to both sexes, & in those in which they are confined to the males? I am anxious for information on this head, as I believe such facts have an important bearing on an obscure point in inheritance.

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    f1 6464a.f1
    In Descent 1: 286, CD suggested that a character that appeared at an early age would tend to be inherited equally by both sexes; in ibid., p. 289, he noted that, contrary to the general rule, he had found no evidence that merinos developed their horns later than sheep breeds in which both sexes had horns.
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    f2 6464a.f2
    The printed version of the letter, which appeared in Gardeners' Chronicle, 21 November 1868, p. 1218, has been used to supply the phrase, `or to any one who has the power of inquiring about such breeds', which was omitted from the catalogue description of the original letter.
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