Disappointed to put off CL’s visit because of illness of CD’s sister [Susan], but hopes to see him in October.

Thanks for lending pamphlet [L. Agassiz, Geology of the Amazons]. Agassiz has written "wild nonsense".

Refers to a translation of Pictet and Humbert’s "capital" paper on fossil fish ["Recent researches on the fossil fishes of Mount Lebanon", Ann. & Mag. Nat. Hist. 3d ser. 18 (1866): 237].

Hooker’s lecture at BAAS Nottingham meeting.

Hopes to send a copy of his new edition [of Principles of Geology] in a few weeks. Hopes he will be satisfied with the manner in which he used JH's drawings. Comments about variations in the obliquity of the ecliptic. Quotes correspondence he has had with E. J. Stone of Greenwich Observatory. Would like JH's opinion on the matter.