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Darwin Correspondence Project

To J. J. Weir   27 May [1869]1

Down, Beckenham, Kent.

May 27

My dear Sir

Many thanks for your answer about the migratory birds and I have also written to Mr. Swaysland at Brighton.2 All the pieces of information in your last letter are just the fish which I like to catch in my net. I don’t remember what I have said about Canary hybrids, but thought I had only stated that the Canary crosses easily with many other species; I will however keep your note and look to my authorities if I live to come to the subject.3 I am glad to hear about the Canary at once selecting as its mate the greenfinch, but I am surprised it did not choose the siskin.4

With many thanks believe me | Yours very sincerely | Ch. Darwin


The year is established by the relationship between this letter and the letter from J. J. Weir, 26 May 1869.
CD’s letter to George Swaysland has not been found, but see the letter from George Swaysland, 12 June 1869.


Thanks for information about bird migration.

Comments on canary hybridisation.

Letter details

Letter no.
Charles Robert Darwin
John Jenner Weir
Sent from
Source of text
DAR 148: 323
Physical description

Please cite as

Darwin Correspondence Project, “Letter no. 6759,” accessed on 24 September 2020,

Also published in The Correspondence of Charles Darwin, vol. 17