Search: Pickard-Cambridge, Octavius in addressee 
1870-1879::1874::02::20 in date 
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From:
Charles Robert Darwin
To:
Octavius Pickard-Cambridge
Date:
[before 20 Feb 1874]
Source of text:
American Philosophical Society (Mss.B.D25.437)
Summary:

Discusses meaning of term "sexual selection".

Comments on variability in males.

Contributor:
Darwin Correspondence Project