Will be glad to have SPW’s criticisms of Origin.

Discusses his use of terms, "typical" and "specialisation".

Emphasises large body of facts explained by his theory of species.

Regrets he cannot answer SPW’s questions.

Discusses antiquity of subaerial volcanoes.

Disagrees "entirely & absolutely" with L. von Buch’s "elevation-crater-theory".

Gives directions to Down. Would be happy to see SPW but regrets they "have no attractions".

Agrees about colonisation of Arctic region.

CD thought that his St Helena land shells had quite recently become embedded; his specimens are at the Geological Society.

Can SPW ask A. Günther for any references to Silurus escaping from the Danube?

Points out some errata in the Origin.

Discusses the factors producing the shape of the cells of the honeycomb.

Reports case of two varieties of musk-rat that behave very differently but are, according to Waterhouse, the same.

Has been writing a notice of H. W. Bates’s "capital book" [Naturalist on the river Amazons (1863)].

P. M. Duncan’s coral paper [J. Geol. Soc. Lond. 29 (1863): 406–58] strengthens SPW’s belief in the general diffusion of marine forms westward in the course of time.