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Edwards, W. H. in correspondent 
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From:
Charles Robert Darwin
To:
William Henry Edwards
Date:
23 Apr [1872]
Source of text:
John Hay Library, Brown University (Albert E. Lownes Manuscript Collection, Ms. 84.2 (Box 3, Folder 38))
Summary:

Thanks for part nine of WHE’s [Butterflies of North America (1868–72)].

Comments on trimorphism in Papilio ajax.

Contributor:
Darwin Correspondence Project