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From:
Frederick F. Geach
To:
Charles Robert Darwin
Date:
4 July 1868
Source of text:
DAR 165: 23/2
Summary:

Answers to Expression questionnaire.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Henry Baker Tristram
Date:
4 July 1868
Source of text:
The British Library (Surrogate RP 9485)
Summary:

Thanks for interesting letter. ‘How very curious the case of the bright-coloured birds which conceal themselves in holes!’

Contributor:
Darwin Correspondence Project