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

Thanks AD and the naturalists at the Station for their birthday congratulations.

CD has been awarded the Bressa prize of the Accademia delle Scienze in Turin, and it occurs to him that if the Station wanted some apparatus costing about £100, he would like to pay for it.

Leaves decision as to use of his gift to AD.

AD exaggerates what CD has done for science.

On the Zoological Yearbook, CD thinks it would be an excellent plan to give an account of zoological publications from all countries in a single work.

Thanks for AD’s letter.

Owen has published a paper on the brain in relation to the mouth ["On the homology of the conario-hypophysial tract", J. Linn. Soc. Lond. (Zool.) 16 (1881–2): 131–49]. CD cannot avoid suspicion that the original idea was borrowed from AD.

F. M. Balfour very ill. His death would be a great loss.

Thanks AD for his paper on "Morphology of the Arthropoda" [Rep. BAAS 37 (1867) pt 2: 82], a deeply interesting subject.

Suggests he examine specimens of Scalpellum.

Fritz Müller thinks CD is mistaken, but CD cannot persuade himself he was wrong in his observations on Balanidae [Living Cirripedia 2: 105].

Thanks AD for his work. CD regrets he is not a better German scholar, but he must endeavour to understand AD’s views.

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.