Sending copy of Origin; "it may possibly lead you to reflect further on the side opposed to your view".

Sends Origin to FJP. "I rest my conviction solely on the fact, as it seems to me, that the theory explains large classes of facts otherwise inexplicable." Has made important converts: Lyell, Hooker, Huxley, and W. B. Carpenter.

Believes Origin makes science "young, clear, elevated" but does not have the facts to prove that cumulated slight modifications could ever produce different families from common ancestors. [See 2709.]

Is extremely pleased by what FJP says of his book [Origin]. Recalls how slowly he changed his own opinion; does not think anyone "could at once undergo so great a revolution in opinion". Thanks FJP for his intended notice of the work [Bibl. Univers. Arch. Sci. Phys. & Nat. 7 (1860)].

Recommends an "excellent Review by that admirable Botanist Asa Gray" [Am. J. Sci. 2d ser. 29 (1860): 153–84].

L. Agassiz is very bitter against CD’s book but H. G. Bronn, although very much opposed, "with noble liberality of sentiment" is going to superintend a German translation.

As FJP’s studies lead him to reflect on "Geological Succession, Geographical Distribution, Classification, Homology & Embryology", CD expects that he will go a little further with him because "these facts … are inexplicable on the theory of creation".

Thanks FJP for his review which CD has received and read. There have been many reviews in England opposed to CD but FJP’s is "the single one which seems … perfectly fair & just & candid". The only difference between them is that CD "attaches much more weight to the explanation of facts, & somewhat less weight to the difficulties" than FJP. "I always jump at any theory which groups & explains facts".

Would be proud to send FJP a copy of his Journal of researches.