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Down, J. L. H. in correspondent 
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From:
John Langdon Haydon Down
To:
Charles Robert Darwin
Date:
18 Dec 1873
Source of text:
DAR 87: 63–4
Summary:

Describes features of an ear of a microcephalous idiot, one of which contradicts Carl Vogt’s views [Mémoire sur les microcéphales (1867)].

Contributor:
Darwin Correspondence Project
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From:
John Langdon Haydon Down
To:
Charles Robert Darwin
Date:
20 Dec 1873
Source of text:
DAR 87: 61–2
Summary:

Describes an ear from a microcephalous idiot, which does not lend support to Ludwig Mayer’s view [that points on ears are mere variations; see Descent, 2d ed., pp. 15–16].

Is working on involution rather than evolution, with results confirming CD’s teaching.

Contributor:
Darwin Correspondence Project
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