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From:
Charles Robert Darwin
To:
Thomas Davidson
Date:
23 Dec [1856]
Source of text:
American Philosophical Society (Mss.B.D25.142)
Summary:

Asks TD about variation among brachiopods.

Contributor:
Darwin Correspondence Project
From:
Henry W. Field
To:
Sir John Herschel
Date:
[23 December 1856]
Source of text:
RS:HS 7.216
Summary:

Pleased to hear of his improved health. Has sent some of the substance he requested. Affairs at the Mint not very satisfactory.

Contributor:
John Herschel Project