My dear Sir.

I must thank you very sincerely, whether or not the proceeding is a proper one on my part, for your magnificent Review in Nature—² I shall be amply rewarded if my book deserves less than half of what your kind sympathy has led you to say.—

I did not answer your card, for I receive so many letters I hardly can answer them; one of my sons also detected the stupid blunder, which is corrected in the later copies.³

I heard today that 2250 Copies have been sold; I advised M^r Murray very badly for I told him if 1250 were printed these would last for all eternity—⁴

Yours sincerely & obliged. | Ch Darwin.