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From:
Charles Robert Darwin
To:
David James Brown
Date:
18 Apr 1864
Source of text:
American Philosophical Society (Mss.B.D25.299)
Summary:

Discusses DJB’s MS concerning the origin of species.

Contributor:
Darwin Correspondence Project
From:
William Erasmus Darwin
To:
Charles Robert Darwin
Date:
18 Apr 1864
Source of text:
DAR 110: A77–81b
Summary:

CD is right about variability [of Pulmonaria]. Encloses observations and diagrams of additional plants.

Contributor:
Darwin Correspondence Project
From:
Thomas Henry Huxley
To:
Charles Robert Darwin
Date:
18 Apr 1864
Source of text:
DAR 166: 301
Summary:

No doubt that Owen wrote "Oken" and the archetype book, which appeared in its second edition in French.

Pressures of work and family.

Contributor:
Darwin Correspondence Project
From:
Sir John Herschel
To:
William Walker
Date:
[18 April 1864]
Source of text:
Bedgebury
Summary:

Agrees to sit for photographic portrait by WW. Thanks for reserving copy of WW's successful [Distinguished Men of Science Living 1807-8] for JH.

Contributor:
John Herschel Project