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From:
Charles Robert Darwin
To:
Samuel Birch
Date:
21 Apr [1861]
Source of text:
British Museum (Department of the Middle East, Correspondence, 1826–67: 1493
Summary:

Regrets having troubled SB during his illness. His thanks for the assistance already given.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Erasmus Darwin
Date:
21 and 22 Apr 1861
Source of text:
DAR 210.6: 62
Summary:

Returns [an unspecified] enclosure referring to "a most wonderful cure".

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Philip Lutley Sclater
Date:
21 [Apr 1861]
Source of text:
American Philosophical Society (Mss.B.D25.245)
Summary:

Asks about species of Opetiorhynchus.

Contributor:
Darwin Correspondence Project