Pleased with CD’s praise of his work. He agrees with CD that intermediate marine fossils are rare in the same bed. The difficulty is overcome by extensive search of "isotopic" fauna in different beds of the same "isotopic" region.

Sends article on "Evolution" [Encyclopaedia Britannica, 9th ed.]. CD will be interested in Lamarck’s opinions in 1794.

Is working on crayfish and their distribution.

Report of an "eight legged horse" considered to be an example of reversion.

JDH’s scheme for lowering F.R.S. fees by creating a fund through membership subscription.

Comments on publication of his Atlas der Botanik [1878]. Discusses possible English edition. Draws CD’s attention to plates of Drosera in Atlas. Mentions contribution offered by Hermann Müller, and support by German professors of botany.

Would like to read Weismann’s essay on Daphnidae.

Fritz Müller’s paper on odours emitted by butterflies was read at last Entomological Society meeting.

Comments on positive response to publication [of Atlas]. CD’s approval will help make an English edition possible. Rejects suggestion that CD should subscribe.

Thanks for permission to use CD’s observations on instinct. Would like to use CD’s MS chapter in preparing forthcoming book [Mental evolution in animals (1883)].

Thanks for permission to use CD’s MS chapter on instinct for forthcoming book.

Describes his talk with Julius von Sachs about canary-grass.

Seeks CD’s support for W. C. M’Intosh, candidate for Chair in Natural History at Aberdeen.

Sends CD a copy of his book [Flowers; their origin, shapes, perfumes and colours (1878)].

Sends a paper by Melchior Neumayr [‘Über unvermittelt auftretende Cephalopodentypen’, Jahrb. K.-K. Geol. Reichsanst. 28 (1878): 37–80].

Plans to marry soon.

Next year he will begin a practical course in geology to supplement his lectures.

Progress of experiments. Wants CD’s advice on best way to cross-fertilise his plants.

Name of plant: Colocasia antiquorum, Schott. = Caladium esculentum, Hort. Vent.

The results of WHD’s long series of investigations of effects of steadily and slowly altered environment on putrefactive organisms "palpably demonstrate [CD’s] great doctrine".

Sleep of Porlieria hygrometrica seems independent of light.

Will have lots of time for oats. W. F. P. Pfeffer’s point is that there is no growth in sleepers with joints. A. F. Batalin says there is a slight growth.

[Dated Saturday 28th by FD.]

Is frustrated to see, from a paragraph in Nature [18 (1878): 242], that Charles Lagrange has got hold of the same sort of ideas as he has.

Erasmus is unwell.