Sends list of plants with asymmetry in nectar-secreting surfaces and pistils bent in that direction. Shows insect agency so important that structure has changed. Asks for contrary or confirming examples and that request be passed on to Daniel Oliver.

JDH has settled the Leschenaultia case, but it remains a difficulty to CD.

Goodenia, like bee orchid, seems a case of a structure with an evident function, which is not carried out. Is curvature of styles an incidental result of growth or a pollination adaptation?

No summary available.

To understand Leschenaultia pollination CD requires field observations in the native country.

Has observed two forms of cowslips, which he calls male and female. The same two forms are found in primroses.

Describes Sedgwick’s attack on CD’s views [at Cambridge Philosophical Society] and his own defence, though he believes CD has pressed his hypothesis too far.

No summary available.

No summary available.

Dissection of Leschenaultia convinces CD insect agency necessary for self-fertilisation in this case.

Primroses and cowslips seem universally to occur in two forms. Very curious to see which plants set seed.

J. S. Henslow’s defence of CD;

[Thomas?] Thomson’s opposition to Origin.

Instructs JDH on how to pollinate Leschenaultia.

Evidence of Leschenaultia and the dioecious condition of cowslips and Auricula is making necessity of insect pollination "clear and clearer".

Lyell, de facto, first to stress importance of geological changes for geographical distribution.

Asa Gray has given CD too much credit for theories of geographical distribution.

Reaction to hostile criticism

and debt to Lyell, Huxley, JDH, and W. B. Carpenter.

Gives references to experiments on cowslip for W. H. Harvey.

Suggests possible sources of error in results. Feels evidence is overwhelming that cowslip and primrose are varieties.

Has received laudatory verses on the Origin from some botanist; suspects Francis Boott.

Darwin references a "capital" letter he has received from ARW following ARW's reading of On the Origin of Species.

Floral anatomy.

Wallace’s capital response on reading Origin.

E. W. Binney has published on coal-plants living in marine waters ["On the origin of coal", Mem. Lit. & Philos. Soc. Manchester 2d ser. 8 (1848): 148–94], an old CD idea.

Waste of pollen in horse chestnut will make a good case against perfection.

Convinced selection is the efficient cause. Less convinced of physical causes than JDH because he sees adaptation everywhere and that must be due to selection.

Harvey’s letter to JDH more accepting of natural selection than CD expected.

Battle over Origin is raging in the United States.

Weary of hostile reviews.

Doubts about going to Oxford [for BAAS meeting].

CD’s response to criticism of natural selection. Exasperated at not being understood. He tries to narrow the gap between himself and JDH.

Floral anatomy of Goodeniaceae: although flowers seem to fertilise themselves by pistil moving to anther, CD shows that insect agency is necessary. Wants JDH to check his interpretation of stigmatic surface.

Progress of [Thomas?] Thomson and G. H. K. Thwaites on accepting mutability.

Bee orchid pollination.

JDH has written to CD on homologies of stigma in Goodeniaceae.

Has reread JDH’s paper ["On the functions of the rostellum of Listera ovata", Philos. Trans. R. Soc. Lond. 144 (1854): 259–64].