Thanks for copies of FVH’s "Preliminary field report [of the U. S. Geological Survey] of Colorado and New Mexico" [Am. J. Sci. 49 (1870): 258–63] and Geological report [of the exploration] of the Yellowstone [and Missouri] River[s under the direction of Captain W. F. Reynolds (1869)].

Discusses flora of Sandwich Isles. "There is nothing I shd enjoy so much as to visit California, but I am growing old & my health is weak".

Thanks for HHV’s interest in the census [CD’s plan to add questions on consanguineous marriage to the census] on which CD hopes to persuade Sir J. Lubbock to speak.

Crossing experiments and self-sterility [in Eschscholzia].

Pangenesis.

Hermann Müller on insect adaptations for fertilisation of flowers.

CD working on book on man and sexual selection.

In a fortnight will begin to arrange notes on expression. Asks for FCD’s conclusions about the contraction of eye muscles. Is interested in abstract of FCD’s experiments on "rate of travelling of the nervous powers".

Encloses part of letter from Fritz Müller on Passiflora, with seeds.

Is endeavouring to have included in next census a question as to whether the parents in each household are cousins.

Comments on WP’s biographical article on CD. Asks him to thank O. F. Peschel for his present of the publication [Das Ausland 2 Apr 1870].

Expresses sympathy [on death of FCD’s daughter].

Will be grateful for his paper and letter.

Explains why he has declined writing a review for Messrs Appleton.

Intends to see Adam Sedgwick.

Arranges to meet AN.

Concern about futures of Willy [Hooker] and Horace [Darwin].

Henrietta [Darwin] back from Cannes.

CD has been to Cambridge to visit Frank [Darwin]. Saw Sedgwick, who took him to the [Geological] Museum and utterly exhausted him. Humiliating to be "killed by a man of 86".

Saw Alfred Newton.

CD has been working away on man, to much greater length (as usual) than expected,

and on cross- and self-fertilisation.

Does JDH happen to have seeds of Canna warszewiczii matured in some hot country?

Sympathises with JDH on Dawson’s paper – amusing that Dawson hashes up E. D. Cope’s and L. Agassiz’s views.

Thanks for copy of part one of EPW’s Spicilegia biologica (Wright 1870).

Fertilisation of barberries.

Passiflora.

Is continuing his experiments on the comparative growth of crossed and self-fertilised plants.

Comments on QdeB’s volume [Charles Darwin et ses précurseurs Français (1870)]. Mentions error concerning his views on Parus and nuthatch.

Discusses Canis magellanicus.

Discusses reception of his views in France and Germany.

Thanks Society for honour of his election as Honorary Member.