Dear & respected Sir.
I thank you sincerely for your letter & your pamphlet.—2 I had heard (I think in one of M. Quatrefage’s books)3 of your work & was most anxious to read it, but did not know where to find it. You could not have made me a more valuable present. I have only just returned home & have not yet read your work when I do if I wish to ask any questions I will venture to trouble you.— Your approbation of my book on Species has gratified me extremely—4 Several naturalists in England, North America & Germany have declared that their opinions on the subject have in some degree been modified, but as far as I know my book has produced no effect whatever in France & this makes me the more gratified by your very kind expression of approbation.5
Pray believe me, Dear Sir. | With much respect. | Yours faithfully & obliged. | Ch Darwin
Please cite as “DCP-LETT-3992,” in Ɛpsilon: The Charles Darwin Collection accessed on