Thanks AD for the handsome Annual Report of the Zoological Station (1878). Rejoices at its success and its great service to science.

The Zoological Garden has only one old adult male of Limulus. When there were females, eggs were never observed.

Encloses a separate letter [formerly 7071] about AD’s scheme [for a zoological station].

Suggests AD be cautious [in his work]. "Caution is almost the soul of science."

Agrees to have his name on the list of naturalists to whom annual report [on zoological station] should be sent.

His health has been very bad for last six weeks.

Thanks AD for his article in Das Ausland ["Englische Kritiker und Anti-Kritiker über den Darwinismus", 49 (1871): 1153–7].

Mivart’s book [Genesis of species], which misinterprets CD’s views, has produced a great effect in England.

He has answered the point about incipient structures being useless in new [6th] edition of Origin.

His Descent has had immense circulation, but has met with approval of hardly any naturalists. He supposes it was a mistake to publish it, but it will pave way for a better work.

Rejoices at success [of Naples Zoological Station]. Will send complete set of his books to the library.

If AD is interested, he will send a copy of Expression when it comes out.

Invites AD to visit Down.

Thanks AD for kind review of Expression. AD’s remarks on necessity of tracing development of functions are novel and valuable.

Thanks for birthday greetings.

Comments on work at Naples Zoological Station. F. M. Balfour to visit Naples. Would like to send third son [Francis Darwin] to learn art of observing marine animals.

Health indifferent.

CD is grieved to hear that AD is overworked and troubled about the Zoological Station. Glad he is now writing to seek assistance from English naturalists. Sends a subscription of £100 and £10 each from George and Francis Darwin.

Has written to J. Murray to have account of the Zoological Station inserted in the Murray guidebook.

The circular about the Station has been printed; some have already signed.

Received R. Kossman’s paper on Anelasma ["Untersuchungen über die durch Parasitismus hervorgerufenen Umbildungen in der Familie der Pedunculata", Verh. Phys.-med. Ges. Würz. N. F. 5 (1874): 129–57]. The case is the most interesting ever recorded of gradation, i.e., from an animal with a stomach to one with roots like a plant.

Delighted he will examine the complemental males of Scalpellum.

The Zoological Station has already resulted in "capital work" by F. M. Balfour and Ray Lankester. G. J. Romanes is coming next year.

CD will be interested in AD’s ancestry of vertebrates. "I shall be very sorry to give up the ascidians."

Thanks AD for his Ursprung [der Wirbelthiere (1875)], which astonished CD. AD’s views, if accepted by competent authorities, will show how much we have to learn about the history of every animal. Suggests caution on "degradation principle". Comments on other views in the work. Has long seen importance of the principle of "Functionswechsel" [transfer [change!?] of function], but never enunciated it as a distinct principle.

AD is aware of revolutionary character of his pamphlet [Ursprung der Wirbelthiere]. Authorities will not agree with him. Carl Gegenbaur and Ernst Haeckel are opposed. Younger biologists are disposed to accept his views. All he can expect is to put a stop to "the Amphioxus–Ascidian affair, and to open a road for speculation and for investigation on the side of the Annelid-homology".

Regrets he is too busy to accept CD’s invitation to visit Down, but could only thank him again for saving the Zoological Station from shipwreck.

Thanks CD for his support and for his cautionary advice.

Will send his work on embryology of arthropods as soon as it is finished [Bau und Entwicklung der Arthropoden (1870)].

Thanks CD for Variation.

From his work on insect embryology he sees a great parallelism between insect and vertebrate embryology.

The zoological station is slowly advancing.

Reports on the international support he has obtained for the zoological station [see 7038]. Asks CD whether he will serve on a board of naturalists who would receive an annual report on the station.

Huxley is now convinced by AD’s views on homologies of the nervous system of arthropods, annelids, and vertebrates. Kovalevsky takes the same line but does not go far enough.

AD is sorry CD thinks publication of Descent a mistake. The excitement shows it was necessary for someone to speak plainly.

His great difficulties (Italian indolence, dishonesty, hatred) in establishing zoological station. Can at last start construction.

Has reported on the Naples Zoological Station to BAAS meeting at Brighton. Hopes to open it in January. Is at work building up the library by contributions from publishers and naturalists.

Deplores Wallace’s "drifting away" and his association with such men as H. C. Bastian.

Disbelieves in ascidians as our ancestors. Has a substitute he is sure will please CD.

Will call on CD next year, when he will have worked out the embryology of Amphioxus; he believes it is not primitive but a degenerate form of fish. He believes the true ancestors of vertebrates are annelids.

Is amazed at Expression. Like CD’s former works, it contains the material and principles of a new science.

The Zoological Station is making good progress – now has a fine building. Hopes for a stable income from contributions of various governments.