Thanks GC for his assistance. "The data for all that I have to say about the Scotch deer-hound are, owing to you, almost sufficient; and much better data than I have got in many other cases." [See Descent 2: 260.]

Believes Dr Stirling would be compelled to admit some change in "the famous protoplasm in our domestic races, both in regard to the structure of the body & qualities of the mind".

Thanks JS for three essays. Has read with great interest the essay on the basking shark ["Sur les appareils tamiseurs ou fanons branchiaux du Pélerin", Kjo|benhaven Oversigt (1873): 47–66]. The explanation that the comb-like structures are of the nature of teeth is a "most wonderful case".

Sends his photograph.

Offers to send collection of cirripedes to Copenhagen Museum in return for assistance in his research. Mentions publication of Living Cirripedia, vol. 2.