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Darwin, C. R. in correspondent 
Nordhoff, Charles in correspondent 
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From:
Charles Nordhoff
To:
Charles Robert Darwin
Date:
27 Feb 1872
Source of text:
DAR 172: 72
Summary:

Reports the case of a cockerel raised in isolation from other cocks which repeatedly attempted, but failed, to crow properly.

Also discusses behaviour in horses; one male will "look after" 20–25 females.

Contributor:
Darwin Correspondence Project