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1870-1879::1875::02::23 in date 
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From:
James Gibb
To:
Charles Robert Darwin
Date:
23 Feb 1875
Source of text:
DAR 165: 35
Summary:

Thinks he has observed the origin of the shake of the head as signifying "no" in his seven-month-old son.

Contributor:
Darwin Correspondence Project
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