Discusses possible translation of Origin into German. Could HGB advise E. Schweizerbart [Stuttgart publisher] about good translator. Suggests Bronn edit the translation.

Thanks HGB for agreeing to superintend translation of Origin.

Comments on HGB’s review.

Encloses corrections and preface for Schweizerbart. Discusses translation of term "natural selection".

Discusses meaning of various English scientific terms.

Is much pleased that translation [of Origin, 1st German ed.] will be ready by May.

Thanks HGB [for his Morphologische Studien (1858)].

Pleased at quickness of translation.

Has received copies of translation of Origin. Thanks HGB for undertaking it.

Comments on review by F. J. Pictet ["Sur l’origine de l’espèce, par Charles Darwin: analyse et critique",Arch. Sci. Phys. & Nat. n.s. 7 (1860): 231–55].

Thanks HGB for sending copies of his Untersuchungen [1858] and Morphologische Studien [1858] and for a portrait.

Responds to HGB’s critique of Origin [appended to German translation of Origin]. Comments on English reviews.

Answers HGB’s criticism of Origin.

Explains HGB’s case of differences in rats by adaptation.

CD’s view explains homological and embryological resemblances of each type.

Does not believe all development is at same rate. Cites Australian forms.

Does not see force of objection that origin of life must be explained.

Asks if C. L. Brehm’s subspecies of birds are really characteristic of regions of Germany.

Pleased that new German edition of Origin is wanted. Wishes to make corrections.

Suggests German translation of Orchids.

Comments on HGB’s book [Untersuchungen (1858)].

Sends additions and corrections for 2d German ed. of Origin [1862–3].

Before a German translation of Orchids is done, CD thinks HGB should read part of it and decide if it is worth while; CD has doubts.

Encloses answers and corrections [concerning Orchids]. Thanks HGB for translating it.

Sends additional notes.