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From:
Charles Robert Darwin
To:
Edward William Vernon Harcourt
Date:
19 Aug [1856]
Source of text:
Houghton Library, Harvard University (Autograph File, D)
Summary:

Asks to borrow C. L. Brehm’s book [Handbuch der Naturgeschichte aller Vögel Deutschlands (1831)]. Wants to see how far Brehm went in splitting species.

Took finches from Madeira to British Museum.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Unidentified
Date:
9 Oct [1856]
Source of text:
Houghton Library, Harvard University (Autograph File, D)
Summary:

Thanks for offer of Helix for experiment. Asks for assistance. Mentions failure of his own experiment involving Helix pomatia.

Contributor:
Darwin Correspondence Project