My dear Sir
I must write two or three lines to thank you for the extremely kind manner in which you have reviewed my book on Expression in the Academy.2 I have been greatly interested by your article; & your remarks on the necessity of tracing the development of functions strike as novel & very valuable.3
With my renewed thanks & hearty respect | Yours very truly | Ch. Darwin
I was very glad to see the other day so good a report of your work at Naples.4
Please cite as “DCP-LETT-8933,” in Ɛpsilon: The Charles Darwin Collection accessed on