Has just given a paper [on "Sand tubes"] at Cambridge Philosophical Society and exhibited some specimens. It went well, with Whewell and Sedgwick taking an active part.

Herschel thinks 6000–odd years since the creation not nearly long enough to explain the separations from a single stock.

Sends a number of questions (to put to his father), mainly concerned with transmission of diseases, between Europeans and natives, "people packed together", etc.

Is investigating how to get Government support [for Zoology].

His books grow in size. Hopes to bring out work on volcanic islands and coral formations in the autumn or winter. The Journal of researches will not be published until autumn [actually not until 1839]. Whewell and Lyell flatter him about it. Has given up all society.

Describes his routine for a typical day – writing Coral reefs, studying German.

FitzRoy’s "Deluge Chapter" [Narrative 2, ch. 28] will amuse her.

His opinion of Carlyle’s Critical and miscellaneous essays [1839].