A memorandum describing the expressive behaviour of a cat with added notes by CD.

Thanks JS for orchid paper [Trans. Bot. Soc. Edinburgh 7 (1863): 543–50]. JS presents excellent new facts on sterility of orchids.

His argument that coloured primroses are not hybrids is good, as is idea of discovering primrose parentage by breeding for colours.

Tendril plants received.

Has just completed large crossing experiment with Lythrum.

Sends a map of the province of Canterbury, marking his own and other explorations.

Forwards an enclosure for CD, at Archdeacon John Sinclair’s request [extract from J. Sinclair’s Life and works of Sir John Sinclair (1837) 2: 83–5], showing how Dr Erasmus Darwin anticipated Justus von Liebig [in recognising the importance of phosphorus-rich manures].

Thanks for presentation copy of Linum paper [Collected papers 2: 93–105].

Ficus experiments confirm CD’s supposition that insects visit Melastoma for nectar, but HC thinks pollen-seekers fertilise the flowers.

Maranta fertilisation.

Doubts Decaisne’s report of larkspur self-fertilisation.

Enthusiastically observes climbing plants. Needs to know how novel his observations are. Finds R. J. H. Dutrochet has made similar observations, so he has wasted some time. [See Climbing plants, p. 1 n.]

Sends two interesting cases: a flamingo with barnacles covering its legs

and castrated wild asses of Kutch.

The almond-tree TR gave him produced no fruit, but the Chinese double peach has three. Asks for ripe almond fruits and any odd peaches, to compare the stones.

Asks about modification in fruit or foliage in any fruit-trees from being grafted,

and about seedlings of pears and wheat said to have been found in hedges and woods.

Has signed and forwarded some orders.

Agrees to examine a slide preparation of fluid [from CD’s vomit] to determine presence of Sarcina as a possible cause of his stomach ailment. Sends some authoritative references on it. Warns CD that Sarcina has been found in healthy stomachs.

Sends information about Pliocene fauna of the "Forest Bed" of the Norfolk coast.

A genus described as extinct by Owen is found by E. A. I. H. Lartet to exist in Russia.

Edouard Suess attributes to Oswald Heer and HF the generalisation "That the time during which a new species is formed, is (as a rule) very short in comparison with the time during which it persistently presents the same peculiar specific characters". [Edouard Suess, "Über die Verschiedenheit und die Aufeinanderfolge der tertiären Landfaunen in der Niederung von Wien", Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften in Wien (Math-naturw. Klasse) 47 (1863): 306–31.] [See 4277.]

Thanks for information about Pliocene mammal. Interested in relating process of formation to duration of the species. Oswald Heer’s view that species suddenly formed surely false.

Bad summer with much sickness. Going to Malvern [for water-cure] for a month.

Muddled over phyllotaxy and made out nothing.

CD’s illness: he is vomiting "vegetable" cells.

Dutrochet has published the best of CD’s observations on tendrils [see Climbing plants, p. 1 n.].

Lyell has found Joshua Trimmer’s Arctic shells on Moel Tryfan.

JDH working on the New Zealand flora.

Jules Planchon excited about CD’s Linum experiments.

T. F. Jamieson’s paper on glaciers gives great pleasure.

Discusses and suggests treatments for CD’s stomach complaint. Recommends he consult William Brinton.

Has found no Sarcina on the slides of fluid [see 4272] and nothing referable to the food. Will repeat examination if vomiting recurs.

Suggests CD consult George Busk about his stomach.

[Roland] Trimen of the Cape of Good Hope sends evidence that a moth [Achaea chamaeleon] is capable of perforating the skin of a peach with its delicate proboscis. Have any readers observed moths or butterflies sucking any fruit of which the skin was not previously broken?

The phial of fluid sent by CD is acid. Sends his microscopical examination.