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Leighton, W. A. in correspondent 
1850-1859::1858::11::21 in date 
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From:
Charles Robert Darwin
To:
William Allport Leighton
Date:
21 Nov [1858]
Source of text:
DAR 112: B97–8
Summary:

Thanks WAL for specimens and observations [on scarlet runner beans]. CD is perplexed whether to account for the changes as due to simple variation or to crossing. The information will be used when he finally comes to a conclusion on the subject [see Cross and self-fertilisation, p. 151].

Contributor:
Darwin Correspondence Project