Hooker admires THH’s review of Mivart [see 7977]. Most impressed by THH’s handling of metaphysics.

Hooker’s problems: family health and A. S. Ayrton [Commissioner of Works].

Asks whether THH has written on affinities of Eocene cetacean Zeuglodon. Wants to cite it in 6th ed. of Origin as in some slight degree an intermediate form, but does not know how far he may venture.

Has had more evidence of profound impression of Mivart’s book [Genesis of species].

Answers CD on transitional forms. Has no doubt Zeuglodon is transitional form between Carnivora and Cetacea.

Met Mivart in Manchester. Some doubt that he was the author of Quarterly Review article.