Sends an essay ["Mikrogeologische Studien über das kleinste Leben der Meeres-Tiefgründe aller Zonen und dessen geologischen Einfluss", Abhandlungen der Preussischen Akademie der Wissenschaften zu Berlin (1873): 131-98.]

with expressions of admiration. CGE is confident their differences will not estrange them.

Remembers with gratitude the [Atlantic] dust that CD made available to him in 1844 [see 747].

Gratified that a man of JD’s experience agrees with him.

Would enjoy seeing him at Down but it could only be for a half-hour’s talk at most, because of his health.

CD gives his criticisms of GHD’s essay on religion and the moral sense. Urges him to delay publishing for some months and then to consider whether it is new and important enough to counterbalance the effects of its publication. J. S. Mill would never have influenced the age as he has done had he not refrained from expressing his religious convictions. Cites John Morley’s Life of Voltaire [1872]: direct attacks produce little effect; real good comes from slow and silent side attacks. "My advice is to pause, pause, pause."

Lists observations he would like FD to make on the dried species of Desmodium at Kew.

Lists plants in which he is interested, including Neptunia and Mimosa species.

Do any strictly tropical plants have glaucous leaves?

Asks for observations on irritable plants.

Neptunia is evidently a hopeless case.

Good news that fluid of Nepenthes is acid.

No discovery ever gave him more pleasure than proving a true act of digestion in Drosera.

Has become profoundly interested in Desmodium. Asks whether Frank [Darwin] can look over the whole dried collection of the genus.

Has JDH any seed of Lathyrus nissolia?

Further details on inheritance of an eyelid abnormality.

Wants FD to look at the little lateral leaflets of Desmodium. CD has "a wild hypothesis that the little leaflets may be tendrils reconverted into leaflets".

"It is a fearfully difficult moral problem about speaking out on religion, & I have never been able to make up my mind."

An Irishman, a "grand breeder" of short-horns, declared at lunch that CD’s books had been "a great help to [him] in breeding!"

Suggests experiments to try [with Nepenthes].

Asks JDH to test whether cabbage seeds and peas exposed to the ferment germinate.

Cancel: same as 9523.

Describes his experiments on Nepenthes; finds action analogous to that in Drosera.

Has read letters and MS with great interest.

No ill effects from JD’s visit.

Extremely glad to hear of the aggregation in Nepenthes glands. Advises on experimenting with cubes of albumen – gives sizes, also suggests cubes of roast meat. Thanks for analyses of secretion of Nepenthes.

Asks for cutting of Acacia farnesiana.

Longs to examine a species of Desmodium with three leaflets. Has asked Frank [Darwin] to look for species of Desmodium with tendrils.

Observations on the leaves of Desmodium. Most are trifoliate; none has tendrils. Gives some comments from Hooker.

Thanks for AOK’s work on the larvae of the Ascidians.

Sends plant specimens.

He and Thiselton-Dyer, working on with Nepenthes, have independently found the spiral vessels going to the gland. CD’s view that the glands are secretory organs is suggestive. When Nepenthes is as much done as CD wants,

he will turn to Cephalotus and Sarracenia.

Thanks for leaves. His notes on them will be of greatest service.

He cannot distinguish some Eucalypti from Acacia. Sends specimens, with numbers, for JDH to name.

Acacia farnesiana branches arrived withered, but saw enough to make him wish to examine the plant.

Has thought of some troublesome experiments for Drosophyllum.

Encloses remarks [missing] by Searles Wood, with which CD disagrees, about a new and strongly marked variety transmitting its characters.

The competition of better adapted forms seems to CD a sufficient explanation [for extinction].

Has visited Alford and Beesby.

On Nepenthes.

Asks JDH, if he publishes, to mention CD’s work on digestive powers of Drosera so that charges of plagiarism will not be made against CD later when he publishes.

Describes at length his observations on the movements of Desmodium.

Discusses adaptations in flowers and their heritability.

Mentions advertisements for HS’s book [? Study of sociology (1873)].

Thought HS would have profited by principle that a character appearing late in life is inherited at same age.