From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[21 Feb – 4 Apr 1841]
Source of text:
American Philosophical Society (Mss.B.D25.26)
Summary:
Answers a number of queries from Lyell concerning geography and geology of Chiloé Island and its relationship to the Cordilleras.
Asks about "perched rocks" on Jura and notes their relevance to Louis Agassiz’s theory. Discusses Agassiz’s view on Jura.
Mentions seeing Robert Brown.
Notes R. I. Murchison’s discovery of shells in central England.
Weakness of negative evidence.
Contributor:
Darwin Correspondence Project