Urges JS to publish on orchid pollen-tubes.

Suggests comparing stigmatic tissue of sterile hybrids and fertile parent; he would expect hybrid plant’s cell contents not to be coagulated after 24 hours in spirits of wine.

Suggests JS coat orchid stigmas with plaster of Paris for his work on rostellar germination.

Asks for list of "bud-variation" cases; CD has devoted a chapter to the subject.

Inquiries about I. Anderson-Henry’s observational competence.

Tells JS Acropera capsule should be left to grow.

JS was correct on "bud-variation" in fern frond.

Does not believe Primula structure necessarily related to dioecism, but the difference in fertility of the two forms forced him to admit the possibility.

Sends Acropera capsule for CD to dissect.

Will try to raise Acropera from seed (never done before in Britain) to examine its sexual forms.

Studying primroses, parthenogenesis, and reproduction of some cryptogams.

Received maize varieties from CD.

Thanks JS for the very large Acropera capsule. CD has perhaps made a blunder about the sex of Acropera.

JS was right that successive homomorphic generations of Primula breed true.

JS criticises natural selection as based on an innate "continuously watchful selective principle".

Seeks seed of wild Rocky Mountain maize.

What is CD’s view on origin of maize?

Seeks information on self-sterility of Passiflora and Lobelia.

Weeping habit of trees.

Intended to say bisexual plants presented more established varieties than unisexual, not that they are more variable.

Explains his opinion that homomorphically fertilised Primula will produce only their own form. Is trying homomorphic crosses with different coloured Primula varieties.

Asks to read Asa Gray’s 2d review of Orchids.

Has finally successfully fertilised Gongora, but it was done by unnatural means.

Answers JS’s criticism of natural selection, which he doubts JS understands. CD does not believe in an "innate selective principle".

To understand "utility" JS should read CD on correlation.

Origin of maize: no longer thinks husked form was wild because of Asa Gray’s evidence on its variability.

Has information from Thomas Rivers on weeping habit in trees.

JS’s experiments on coloured primroses.

Encloses bibliographical note on Passiflora.

Thanks for CD’s answers on Passiflora

and Asa Gray review.

Has observed gradation of sterility in Oncidium species.

Has observed rostellar germination and fertilisation in Laelia. The latter was prevented in Bletia by covering the stigma with plaster of Paris.

Gongora atropurpurea capsules are swelling.

Enthusiastic about JS’s work on Passiflora self-incompatibility.

CD quotes JS on rostellar pollen germination [in "Fertilisation of orchids", Collected papers 2: 77–8]. H. Crüger attributes it to ants’ carrying stigmatic secretion to pollen.

Homomorphic cowslip seedlings are, sadly, showing variation.

Encourages JS to publish on sterility of orchids and to experiment on Passiflora.

Doubted Hooker’s poppy case.

Describes case of primrose with three pistils: when pulled apart allowed pollen to be placed directly on ovules. This supports JS’s explanation of H. Crüger’s case.

Thanks for CD’s Linum paper [Collected papers 2: 93–105].

Has not published much because he would be ignored as a gardener; hence he is looking for a foreign appointment.

Has prepared orchid sterility paper at CD’s suggestion [Trans. Bot. Soc. Edinburgh 7 (1863): 543–50].

Glad to hear of JS’s orchid paper [Trans. Bot. Soc. Edinburgh 7 (1863): 543–50].

Suggests experiments on peloria.

Wants to count seed of the self-fertile red cowslip with equal stamens and styles.

Can send account of Hottonia.

Impressed by JS’s attempts to fertilise Gongora.

CD has large collection of notes on orchids, but does not know when he will publish on them again.

Asks for JS’s papers on sterility of individual orchids and on Drosera.

His orchid paper limited because he does not give illustrations from distinct genera.

Discusses the self- and cross-fertility of coloured primrose varieties. Thanks CD for tables of unpublished Primula work.

J. H. Balfour has arranged a position for him at a Cinchona nursery. Reluctant to take this position in part because of his experiments for CD.

Asks CD’s advice and solicits his aid in finding a better colonial position. James McNab mistreats him.

Has written to Hooker for his advice about the Darjeeling position. JS should not refuse the position on account of his experiments.

CD does not think he could be wrong about the stigma of Bolbophyllum.

Will not write up Drosera for years.

Praises JS’s experiments. Invites him to send a paper to Linnean Society.

L. C. Treviranus says all species of Primula present two forms except P. longiflora.

Discusses Darjeeling position. Thanks CD for advice.

Will send orchid paper [see 4087].

Sends abstract from Edinburgh Courant of his orchid sterility paper [see 4087]. Balfour altered title to obscure its theoretical nature.

Sends specimens showing curious variation.

Thanks JS for abstract of orchid sterility paper from Edinburgh Courant. His case of individual sterility will be of highest use to CD. Criticises JS’s writing. Points out weaknesses in the organisation of his argument and the use of inflated, imprecise language.

Thanks CD for influence used with Hooker to obtain a colonial position. Has offended J. H. Balfour by refusing the Darjeeling post and James McNab has become unfriendly, although his experiments do not detract from his garden work.

Will write Primula paper for Linnean Society as CD suggests.

His Darwinism is unpalatable at Edinburgh Botanic Garden.

Describes results with non-dimorphic Primula species. Such cases do not accord with CD’s view that characters are slowly acquired.

Thanks for criticism of his writing style.