Asks BR to make two drawings of dogs to show expressions. Discusses expressions of hostile dog and caressing dog.

Testimonial letter. JM would be well fitted for the Chair of General and Comparative Physiology of the Royal Veterinary College.

Thanks for kindness. BR must not think of trying until he feels inclination and strength for task.

Comments on AW’s work [Einfluss der Isolierung (1872)].

Discusses formation of local races.

Conchologist should investigate whether species of same genus vary during successive geological periods.

Comments on Franz Hilgendorf ["Über Planorbis multiformis", Monatsber. K. Preuss. Akad. Wiss. Berlin (1866): 474–504].

Believes sexual selection will be judged a powerful agency.

Thanks FCD for information, which will make him "strike out a good deal".

Has received German pamphlet.

Will read work by John Soelberg Wells [? A treatise on the diseases of the eye (1869, 1870)].

Discusses his work on expression.

Thanks CC’s father for relic. Remembers almost every boy above him but few below him in the school.

CC’s translation seems capital.

Expresses gratitude on election to Royal Netherlands Academy.

Not surprised incipient disease in female would make her unattractive to male.

Sorry JJW’s official duties are so heavy.