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Darwin, C. R. in correspondent 
Gray, J. E. in correspondent 
1870-1879::1871 in date 
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From:
Charles Robert Darwin
To:
John Edward Gray
Date:
9 Apr [1871]
Source of text:
Boston Society of Natural History (papers at the Museum of Science, Boston, Massachusetts, USA)
Summary:

Thanks for information on colour differences in sexes of Lemur.

Contributor:
Darwin Correspondence Project