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From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
30 July 1837
Source of text:
The University of Edinburgh Centre for Research Collections (Lyell Collection Coll-203/A1/69: 140–2)
Summary:

Galapagos land birds and reptiles.

No two naturalists agree on any fundamental idea [of species]. "Everything is arbitrary."

Has been with Richard Owen going over the S. American fossils.

Has worked out the non-relation between animals’ bulk and luxuriance of vegetation.

The horse once common on the Pampas. The mystery of the extinction of these animals.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[19 Dec 1837]
Source of text:
American Philosophical Society (Mss.B.D25.9)
Summary:

Responds to Lyell’s query [missing] about northern and southern limits of coral islands of the Pacific. Warns that coral islands are much more thinly distributed than people realise and cites examples. Comments on views of Matthew Flinders. Reading work of É[lie] de B[eaumont]. Notes difficulty of setting an east-west boundary to coral islands.

Contributor:
Darwin Correspondence Project