Hooker’s lecture to BAAS ["Insular floras"] was capital,

but hears Wallace’s paper [Address to Anthropology Section, Rep. BAAS 36 (1866): 93–4] was best.

Pleased RS continues zealous work for natural history.

CD considers the report that N. American antelopes’ horns are intermediate between hollow and solid horns of ruminants to be one of the more curious facts he has lately heard of with respect to higher animals [C. A. Canfield, "On the habits of the prongbuck", Proc. Zool. Soc. Lond. (1866): 105–11].

Asks her to see whether the flowers or leaves of Erica massoni are noted as glutinous in the Botanical Magazine.

Inquires about the pods of peony: are they brilliantly coloured and do birds eat them?

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.

L. Agassiz’s evidence [for glaciation of America] is very weak.

Thanks AG for arranging for American edition of Variation, but doubts that the book will be successful.

Has found no differences in pollen of Rhamnus so cannot conjecture whether it is dimorphic.

The common oxlip of England is certainly a hybrid between the primrose and the cowslip whereas Primula elatior is a good species.

Reports experiments on the relative vigour of seedlings from cross- and self-fertilised plants.

Blocks for Variation are much improved. WBT deserves membership in Zoological Society.

Thanks AG for Considérations générales [sur les animaux fossiles] de Pikermi [1866]. The observations on the various intermediate fossil forms seem most valuable.

AG does not fully understand what CD means by "the struggle for existence, or concurrence vitale".

Fertilisation in orchids: Friedrich Hildebrand’s paper.

Self-sterility.

Climbing plants.

Agassiz’s attempts to eliminate all Darwinian views.

Susan Darwin still lives, but is dying.

Requests an Erica massoni to compare with Drosera.

On L. Agassiz’s "astonishing" view that Amazon Valley was filled with gigantic glacier. Asa Gray says LA is determined to cover the globe with glaciers in order to destroy "Darwinian views".

Excellent review of A. Murray [The geographical distribution of mammals] in Gardeners’ Chronicle [(1866): 902].

Frankland’s Royal Institution lecture ["On the source of muscular power" Not. Proc. R. Inst. G. B. 4 (1862–6): 661–85].

Wallace’s paper.

Thanks WB for his paper ["Address in surgery", Br. Med. J. (1866): 186–97, read at British Medical Association annual meeting, 9 Aug 1866].

His memory deceived him about GB’s statement [on propagation of thistles].

Darwin states he hopes ARW's paper on sexual modifications and adaptive mimicry in butterflies will be published.