Rolle has done great service by publishing his book [Ch. Darwin’s Lehre von der Entstehung der Arten (1863)].

Pleased that his book, Ch. Darwin’s Lehre [1863], has CD’s approval.

FR formerly a geologist, now a dealer in natural history objects.

Most active supporter of CD’s theory is Gustav Jäger in Vienna.

FR regards fossil Hipparion as a link between horse and pachyderms.

Thanks FR for sketch of progress of evolutionary theory in Germany.

Compliments to Gustav Jäger.

Comments on FR’s book [Ch. Darwin’s Lehre (1863)].

Thanks FR for copy [of first number] of Der Mensch [1866].

Last fascicles of FR’s book Der Mensch [1866] being sent.

Finds roots of human race in Negroes of Africa, Bushmen of South Africa and New Guinea, and short-headed peoples of south Asia.

Has translated natural selection as natürliche Auslese.

Ludwig Rütimeyer active in developing the descent of mammals.

Thanks for all five numbers of Der Mensch [1866].

Had not known that Rütimeyer had written on modification of species.

Gustav von Leonhard and Hans Bruno Geinitz’s Neues Jahrbuch für Mineralogie, Geologie und Paläontologie [1862–79] unfriendly to CD’s theory.

Lists various German publications dealing with CD’s theory.

Thanks for information about publications.

Hopes Hans Geinitz will take care in correcting Bronn’s translation [of Origin].

Questions CD’s view in Variation that Torfschwein formerly ranged from Europe to China.

Cites numerous German publications relating to CD’s theory.

Thanks for references.

CD in error about Torfschwein.

Comments on German publications.

Asks about breed of fowl in which females have spurs.

Has little information about hens with spurs. Encloses information from Robert Oettel and C. F. Friderich, and from J. F. Blumenbach’s Vergleichende Anatomie [1805]. Recommends various German publications.

Thanks for information on fowls.

Glad to see extracts from Blumenbach about sexual differences in fowls.