To the Geological Society of London 18 November 
[12 Upper Gower Street]
The whole of Mr Chatfields communication on the earthquake at San Salvador is given in the published abstract1
Charles Darwin November 18th
Recommends that Consul Chatfield’s communication on an earthquake in San Salvador [read 5 Feb 1840; Proc. Geol. Soc. Lond. 3 (1840): 179] not be published in Transactions.
Please cite as
Darwin Correspondence Project, “Letter no. 580,” accessed on 29 May 2016, http://www.darwinproject.ac.uk/DCP-LETT-580