Search: Darwin, C. R. in correspondent 
Watson, H. C. in correspondent 
1850-1859::1857::03 in date 
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From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
10 Mar 1857
Source of text:
DAR 181: 35
Summary:

HCW is trying to define what CD means by "variable" genera.

Contributor:
Darwin Correspondence Project