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From:
Charles Robert Darwin
To:
Thomas McKenny Hughes
Date:
24 May 1875
Source of text:
Sedgwick Museum of Earth Sciences (Archive DDF Box 720)
Summary:

Reports some details of the geological tour he took with Sedgwick in North Wales in 1831. Recalls how neither he nor Sedgwick saw the obvious signs of past glaciation.

Contributor:
Darwin Correspondence Project