My dear M^r Cupples

It is indeed very superfluous on your part to wish that you could have given me more assistance. The facts which you have communicated have been of very high interest to me; & nobody in the whole world could have been kinder in taking so much trouble for me.— The data for all that I have to say about the Scotch deer-hound are, owing to you, really almost sufficient, & much better data than I have got in many other cases.—²

I have not D^r Stirling’s paper at hand, for I have lent it, but I think he w^d be compelled to admit some change in the famous protoplasm in our domestic races, both in regard to the structure of the body & qualities of the mind.—³

Yours very sincerely obliged | Ch. Darwin