Recalls being introduced to CD when [undergraduate] at Cambridge.

Sends CD some of his pamphlets

and expresses support of Origin.

Has discovered there are "3 sexes" in the solitary Cynips as well as social insects.

Will send grasses CD asked about.

Reports observations on brood of Australian chicks he is hatching.

On rereading the Origin, offers a criticism on two grounds: 1. Blending inheritance; 2. The tendency of species to elude competing species. Also competition within species eliminates the weak and thus preserves the species.

[Outline sketches of pollen from long- and short-styled yellow cowslips and from red cowslip, magnified 350x.]

Would like to come to Down to visit.

Encloses MS of his paper ["On individual sterility of Oncidium", J. Linn. Soc. Lond. (Bot.) 8 (1865): 162–7].

His next will be on Passiflora, Disemma, and Tacsonia [J. Linn. Soc. Lond. (Bot.) 8 (1865): 197–206].

When he receives proofs of his Primula paper he will add CD’s case about equal-styled cowslip.

Diagrams of short- and long-styled Pulmonaria under magnification.

Henry Holland sends thanks for Zoonomia.

Sir Henry would not expect podophyllin to be good for CD.

Cannot give information about the box of Oxalis bulbs that his brother [Roland Trimen] has forwarded to CD.

On the Borneo cave exploration.

ARW will send his contribution to theory of origin of man. The vast mental and cranial differences between man and apes, whereas structural differences in other parts of body are small. The problem of explaining diversity of human races along with the stability of man’s form during all historical epochs. Discussion with "Anthropologicals" [following reading of ARW’s paper, "The origin of human races", before the Anthropological Society, 1 Mar 1864].

No summary available.

Observations on style length of 150 flowers of Pulmonaria [angustifolia]. [See Forms of flowers, p. 105.]

Is burning to hear CD’s reaction to Wallace’s excellent paper on man ["Origin of human races and the antiquity of man", J. Anthropol. Soc. Lond. 2 (1864): clviii–clxxxvi].

Wallace’s disclaimer of credit for natural selection is high-minded.

No summary available.

Thanks for communicating Oncidium sterility paper [see 4485] to Linnean Society.

Surprised that CD’s seedlings of non-dimorphic cowslip breed true.

Surprised also that the red primrose he sent reverts to wild form. He had reasoned from red’s infertility with yellow that it was an established variety. Tries to correlate inheritance of colour and sterility between varieties.

Cover containing some seeds mentioned in the letter to H. C. Watson, 28 May [1864], f.2 (S 4512).

Glad to hear CD well again.

Will send Lythrum hyssopifolium flowers from Botanic Garden if they are in bloom; does not know where to find wild specimen, but thinks they are same as garden type.

Is finishing his course of lectures, which was attended by 35–45 people.

Sends Pulmonaria anthers, with measurements of styles and pollen counts.

Sends specimens of Menyanthes with observations and drawings [see Forms of flowers, p. 115].

Sends dandelion [enclosed] with peculiar form of achene; suggests this solitary "sport" must have arisen by sudden jump from normal type.