Sends quotation from Armand Trousseau, Lectures on clinical medicine [1868–72] 5: 213, on interruption of menstruation in young girls upon changing schools, as an example of the effect of changed conditions of life.

Sutton says monkeys often vomit, but cannot say whether they do it voluntarily.

Statement of sales of U. S. editions of Origin and Descent.

CD’s letter inviting him to visit did not reach him till he returned home.

Has sent CD’s letter to Nature [see 8448].

Expresses admiration for H. C. Bastian’s The beginnings of life [1872] and comments on its bearing upon Origin.

Sends synopsis of his paper "On diversity of evolution" [J. Linn. Soc. Lond. (Zool.) 11 (1873): 496–505] in which he attempts to show some of the means, other than natural selection, of modification of species.

So far VOK has lost money on his translation of Descent because of pirate editions.

Agrees to share profits on Expression.

Wishes to come to Down to make arrangements for Russian translation of Expression.

CD cannot omit mention of Wilhelm Wundt’s Thierseele [Vorlesungen über die Menschen und Thierseele (1863)] in his book.

Murray could control the number of copies of translation of Expression sold in Russia by the number of heliotypes he will supply.

The buck is well; Dr Carter has returned, and things will go better.

Hostility of birds toward others with same colour;

nuptial plumage.

Spiza cyanea and Spiza ciris.

Parallel quotations from Benjamin Franklin and Descent about absorption of heat by different colours; applies to winter and summer plumage of birds.

Reasoning power in dogs.

VOK is marking the passages [in Wundt, Menschen und Thierseele (1863)] that may interest CD.

Offers observations on expression in Australian dogs, since he knows CD plans to publish on the subject.

Sends a paper in which he has applied CD’s theory of natural selection to the explanation of the mortality rate of new-born infants ["Die Kindersterblickeit", J. Kinderkrankheiten (1872)].

Wishes to have Dutch publication rights for a translation of Expression.

Has reported on the Naples Zoological Station to BAAS meeting at Brighton. Hopes to open it in January. Is at work building up the library by contributions from publishers and naturalists.

Deplores Wallace’s "drifting away" and his association with such men as H. C. Bastian.

Disbelieves in ascidians as our ancestors. Has a substitute he is sure will please CD.

Doubts reported cases of homing instinct in dogs.

Will call on CD next year, when he will have worked out the embryology of Amphioxus; he believes it is not primitive but a degenerate form of fish. He believes the true ancestors of vertebrates are annelids.

Has entered a newspaper controversy with W. P. Lyon [Homo versus Darwin (1872)] who ascribes to CD the saying "natural selection is a kind of god that never slumbers nor sleeps". FWH does not believe CD made this statement.