Responds to note about the MS [Descent] with great interest and promises to obey his instructions. [See 7124.]

Moritz Wagner is going to attack selection theory in his new book on his travels in America [Naturwissenschaftliche Reisen im tropischen Amerika (1870)].

K. G. Semper may attack CD’s theory of coral islands.

Suicide is rare among savages [see Descent 1: 94].

Forwards part of a note [by Mrs L. Agassiz] asking AG to tell CD that Agassiz has never been able to secure one of the fishes sitting on eggs.

In P.S., AG adds, "Agassiz evidently regrets having abused you in former times."

Transformism explains rudimentary organs, and teratology, which are otherwise inexplicable.

Looking forward to publication of Descent

and CD’s expected book on "Variation in nature" [see Variation 1: 4].

Describes his brother Alexander’s discovery of male of Bonellia, a striking example of dimorphism. Encloses a plate with notes on his brother’s work.

The difficulty his wife, Sofya Kovalevsky, has had as a woman in being admitted to Berlin University. Kirchow [Gustav Robert Kirchhoff], at Heidelberg, has taken an interest in her.