Louis Agassiz’s ill health means AG will not get an answer to CD’s query from him. Suggests CD ask Agassiz’s son, Alexander.

Has no details about the origin of the cat-like behaviour of his dog.

Forwards part of a note [by Mrs L. Agassiz] asking AG to tell CD that Agassiz has never been able to secure one of the fishes sitting on eggs.

In P.S., AG adds, "Agassiz evidently regrets having abused you in former times."

The "man-essay" [Descent] is "very interesting but very difficult".

Cat-like behaviour in dogs.

Thanks for information from Louis Agassiz;

wishes he could feel he deserves what Alexander Agassiz says of him.

Statement of sales of U. S. edition of Origin.

Reports case of apparent incipient dimorphism. Observations on variations in flower structure, especially style length, within species of Polemoniaceae.

Believes AG’s cases of incipient dimorphism are due to mere variability. Has found examples in Nolana and Amsinckia; believes such variation is the basis for the development of dimorphism. Was unaware of variations in Phlox.

Sensitivity of Drosera and Dionaea.

Sends questions on expressions of Laura Bridgman.

Has finished Descent. Believes that parts, like that on moral sense, will aggravate AG.

Working on an essay on expression.

Has received CD’s new book [Descent].

Will try to get answer to CD’s queries on Laura Bridgman.

Is reading Descent.

Encloses some answers to CD’s queries about expressions of Laura Bridgman.

CD’s sons, George and Francis, are to visit the U. S. Can AG supply any letters of introduction?

AG hopes to meet CD’s sons, who are visiting America.

Has seen CD’s sons.

Questions AG on earthworm activity in North America and would welcome information from northern Canada if AG has a correspondent there.

Notes the occurrence in U. S. of "vermiform piles" produced by earthworms.

A. S. Packard would like to visit CD to pay his respects.

Sends, via C. L. Brace, his book [Botany for young people, pt 2 How plants behave (1872)], "your own science adapted to juvenile minds".

O. N. Rood sends two copies of an amusing picture by T. F. Beard, "The young Darwinian" to AG, who forwards one to CD.

Thanks for AG’s book, How plants behave [see 8363].

Is correcting proofs of Expression.

Discusses the coiling of tendrils of climbing plants.

AG’s recent tour of the U. S.

Spiralling of tendrils.

Has worked hard on Drosera.

Is interested in tracing the "nerves" of Dionaea which follow the vascular bundles. Finds he can paralyse half of the leaf by pricking it at a certain point.

Wishes AG to carry out two experiments on D. filiformis.

Has received AG’s Dubuque address [Am. J. Sci. 3d ser. 4 (1872): 282–98].