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From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[9 Mar 1841]
Source of text:
American Philosophical Society (Mss.B.D25.23)
Summary:

Defends his theory [in "Parallel roads of Glen Roy" (1839), Collected papers 1: 87–137] against the view that the "roads" were formed by glacial action.

Contributor:
Darwin Correspondence Project