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].