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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:
Sir John Herschel
To:
Thomas Maclear
Date:
[30 July 1837]
Source of text:
RS:HS 21.226
Summary:

Sends TM his nebulae observations and drawings of what he saw.

Contributor:
John Herschel Project