Would like to talk over Salisbury Craigs with CD.

CL’s father enthusiastic over Journal of researches.

Comments on Élie de Beaumont’s theory of mountain elevation.

Asks about parallel lines of upheaval and depression in the Pacific.

Glad CD likes Athenaeum Club.

Comments on methods of work.

Invites CD to visit Kinnordy.

Defends BAAS: "in this country no importance is attached to any body of men who do not make occasional demonstrations of their strength in public meetings".

With respect to Glen Roy, notes existence of deposits destitute of shells.

Comments on an article in Edinburgh Review [by David Brewster, 67 (1838): 271–308] on Comte’s Philosophie positive.

Discusses falsity of Élie de Beaumont’s views of contemporaneous parallel lines of elevation and subsidence.

Owen’s views of relationship of reptiles to birds.

On "question of species" CD has filled notebook after notebook with facts, "which begin to group themselves clearly under sub-laws".