Dear Sir
I beg permission to thank you sincerely for your very kind present of your Essays.—2 I have already read several of them with much interest. Your remarks on the general argument of the so-called Development Theory seem to me admirable.3 I am at present preparing an abstract of a larger work on the changes of species; but I treat the subject simply as a naturalist & not from a general point of view; otherwise, in my opinion, your argument could not have been improved on & might have been quoted by me with great advantage.
Your article on Music has also interested me much, for I had often thought on the subject & had come to nearly the same conclusion with you, though unable to support the notion in any detail.4 Furthermore by a curious coincidence Expression has been for years a favourite subject with me for loose speculation, & I most entirely agree with you that all expression has some biological meaning.—5
I hope to profit by your criticisms on style,6 & with my best thanks, I beg leave to remain | Dear Sir | Yours truly obliged | C. Darwin
Please cite as “DCP-LETT-2373,” in Ɛpsilon: The Charles Darwin Collection accessed on