To B. D. Walsh 20 August 
Down. | Bromley. | Kent. S.E.
My dear Sir
I am sorry to say that before receiving your letter of July 17th the new edit. of the Origin had been despatched by Murray for you.1 I received safely your paper exposing Dana’s mis-quotations; I never cd. persuade myself that there was much or any thing in Dana’s paper, but I see it is taking effect in the United States2
I have read Prof. Clark’s book3 & was interested by it on psychological principles as shewing how differently two men viz. the writer & the reader can view the same subject. I am heartily glad that you are making progress with your Cynips experiment.4 The new gall which has spread so wonderfully in England (& about which by the way there was a letter 2 days ago in the Times)5 is attached not to the leaf but to twigs; so that the bushes are rendered conspicuous in the winter by their numbers. I do not think any one can define an ovule from a bud; the only difference being, as many now view the case, that the former must be fertilized.
Have you seen Balbiani’s extraordinary paper on the vivaparous aphides being at a very early age hermaphrodites:6 he is a capital observer, & Sir J. Lubbock tells me that he has no doubt the appearances are true, for he has seen the same in Coccus, whether the interpretation be correct or not.7
Some of the Germans, as Prof. Claus, have been taking up a subject which I am glad of, namely to ascertain the amount, in order to test my views, of the individual variability of some of the commoner lower animals; & they find it very great.8
My dear Sir | yours very sincerely | Ch. Darwin
On various subjects: Dana’s misquotations,
H. J. Clark’s book Mind in nature ,
BDW’s Cynips experiments, galls,
Balbiani’s paper on aphids ["Sur la reproduction et l’embryogénie des pucerons", C. R. Hebd. Acad. Sci. 62 (1866): 1231–4, 1285–9, 1390–4].
Claus and other Germans testing CD’s views of variability in common lower animals.
- Letter no.
- Darwin, C. R.
- Walsh, B. D.
- Sent from
- Source of text
- Field Museum of Natural History, Chicago (Walsh 5)
- Physical description
Please cite as
Darwin Correspondence Project, “Letter no. 5194,” accessed on 18 January 2017, http://www.darwinproject.ac.uk/DCP-LETT-5194