Has been looking at separation of sexes in poplars.

Interested in reversion.

Does not understand all CD said on inheritance.

JDH now remembers that Origin was "published" some time before it was "distributed" and therefore appeared prior to his own essay [see also 2478].

Impossible to say whether some Dipterocarpaceae survived a cold period or have developed since.

Studying self-sterility, particularly in Oncidium, where abortion occurs consistently but stigma functions normally. His hybrid orchid crosses show sterility occurs capriciously. Thus it is not a "special endowment".

Disputes Asa Gray’s and Hermann Crüger’s view of rostellar germination.

Doubts absolute sterility of Catasetum.

Disappointed by results with homomorphic cowslips.

Observations on Catasetum.

Figs require insects in order to set seed.

Observes Plantago’s out-crossing mechanism.

Observations of style lengths of primroses and cowslips.

Supports, in his orchid paper, CD’s view that sterility occurs at random [Trans. Bot. Soc. Edinburgh 7 (1863): 543–50].

Cannot get his Drosera paper published [abstract in Edinburgh New Philos. J. 2d ser. 17 (1863): 317–18].

Thanks CD for two letters and his portrait.

CD’s book [Orchids] opened up terra incognita for him.

His work on S. African butterflies continues.

Reports on a moth that punctures peach skins.

Interesting that thoughtful naturalists are forced to admit mutability of species.

Some notes on Oxalis.

Sees difficulties in adhering to the concept of design in nature.

Is surprised at Hooker’s and Daniel Oliver’s ignorance regarding spontaneous movements of tendrils.

CD should continue his work on climbing plants, "it will be fruitful in your hands".

Will be glad to have CD.

Notes, calculations, and diagrams on phyllotaxy.

Huxley’s lectures [Man’s place in nature (1863)]; he would be a scientific H. T. Buckle, if he were more careful.

Asks CD what the evidence is for inheritance of acquired characteristics.

Discusses the female parts of the Primula flower; the true character of the free placenta is not completely understood.

Sends description of Chrysosplene, asks about glands.

Describes an astounding "sort of mis-begotten-bird-creature", the Archaeopteryx, a grand Darwinian case.

His elephant paper is out in Natural History Review [(1863): 43–114].

Falconer’s elephant paper.

Owen’s conduct.

Falconer’s view of CD’s theory: independence of natural selection and variation.

JDH on Tocqueville,

the principles of the Origin,

and the evils of American democracy.

Is pleased by CD’s praise of his article.

Hugh Falconer’s is certainly interesting.

Sends Primula scotica and P. farinosa.

So far cannot fertilise Gongora atropurpurea although it is similar to Acropera luteola.

Experimenting on intergeneric hybrids to test CD’s view that sterility is not a special endowment.

Scott’s personal history.

Acropera capsule grows.

Plans for experiments CD has suggested on Primula, peloric Antirrhinum, and Verbascum.

Asks about Gärtner’s experiments on maize.

Aware of Anderson-Henry’s failures.

Through kindness of J. H. Balfour and James McNab, enjoys facilities for research. JS is in charge of the propagating department. Balfour almost engaged him to be superintendent of the Madras Horticultural Garden.

Comments on his elephant paper

and CD’s observations on dimorphism in Melastomataceae.

Answers CD’s query on the free digits of Archaeopteryx.

Sorry CD considers Horace Darwin unfit for school.

Health.

Is sending information about Timor fossils to be forwarded to Hugh Falconer.