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From J. L. H. Down 20 December 1873
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.
Author: | John Langdon Haydon Down |
Addressee: | Charles Robert Darwin |
Date: | 20 Dec 1873 |
Classmark: | DAR 87: 61–2 |
Letter no: | DCP-LETT-9188 |
From J. L. H. Down 18 December 1873
Summary
Describes features of an ear of a microcephalous idiot, one of which contradicts Carl Vogt’s views [Mémoire sur les microcéphales (1867)].
Author: | John Langdon Haydon Down |
Addressee: | Charles Robert Darwin |
Date: | 18 Dec 1873 |
Classmark: | DAR 87: 63–4 |
Letter no: | DCP-LETT-9191 |