Species migration since the Pliocene. Effect of the glacial epoch. Present geographical distribution, especially similarities of mountain floras, explained by such migration; mountain summits as remnants of a once continuous flora and fauna.

Cross-fertilisation in Fumariaceae.

Wishes to know whether differences in constitution (such as disease susceptibility) are related to differences in complexion. "Liability to such a disease as yellow fever would answer my question in the best possible way."

Sends copy of Origin for comments.

Does not feel AG’s views of migration after the last glaciation explain distribution in U. S. as well as CD’s view of migration prior to glaciation.

Would welcome American edition of Origin.

Thanks for AG’s Japan memoir [Mem. Am. Acad. Arts & Sci. 6 (1857–9): 377–452]. Does not think AG’s arguments for a warm post-glacial period are sufficient, but will not be sorry to be proved wrong.

Believes natural selection explains many classes of facts which repeated creation does not.

Writes of some responses to the Origin.

Comments on AG’s memoir on Japanese plants [see 2599]; relationship of Japanese flora to N. American.

If an American edition of Origin is considered worth while, CD would like AG’s reviews prefixed to it.

Will use all his strength to produce first part of his three-volume big work [Variation].

CD is glad there is to be an American edition of Origin printed from the corrected 2d English edition.

Sends historical preface and corrections for American edition of Origin;

would have liked AG’s review [Am. J. Sci. 2d ser. 29 (1860): 153–84] at the head.

Agrees with AG’s assessment of weak points.

Thinks AG’s review is admirable.

Reactions of others to the Origin.

Last sheets of AG’s review of Origin have arrived. CD’s comments and criticisms.

Has been ill with pleurisy.

Sends more corrections and additions for American edition of Origin.

Further additions and corrections for American Origin.

Views of Owen, G. H. K. Thwaites, and W. H. Harvey on CD’s theories.

Thinks AG’s review [of Origin] will aid much in making people think about subject.

Has been savagely and unfairly reviewed by Adam Sedgwick in the Spectator [24 Mar 1860],

but thinks F. J. Pictet’s review in opposition ["Sur l’origine de l’espèce", Arch. Sci. Phys. & Nat. n.s. 7 (1860): 231–55] a very fair one.

Origin reviews. Is annoyed at Richard Owen’s malignity [Edinburgh Rev. 111 (1860): 487–532].

Bitter and incessant attacks on the Origin.

Any truth in it has been saved only by a small body of men like Lyell, AG, Hooker, and Huxley.

Opinions and reviews of Origin.

CD’s view on design in nature; although he does not believe in the necessity of design, he finds it hard to conclude that everything is the result of "brute force".

Comments on Owen’s review of Origin [Edinburgh Rev. 111 (1860): 487–532].

Discusses recent reviews of Origin and has made a note on Owen’s [see 2737].

Has become interested in the floral structures of orchids.

Notes his recent observations on Primula; believes he has found male and female forms.

Origin has "stirred up the mud with a vengeance"; AG and three or four others have saved CD from annihilation and are responsible for the attention now given to the subject. Reports events at Oxford BAAS meeting.

New evidence supports AG’s view of a warm post-glacial period.

Discusses his recent orchid observations.

Poses AG a question on design in nature.

Greatly praises AG’s discussion of Origin in Proc. Am. Acad. Arts & Sci. [4 (1860): 411–15; 424–6].

Mentions other reviews of Origin; believes the BAAS meeting at Oxford greatly advanced the subject. Has heard his views are gaining ground in Germany.