Sends photographs of general paralytics. Expressions of exaltation of [these?] patients do not come out well in the photographs.

Is experimenting with idiots under his care. Has been unable to produce a blush in any one of them.

His beard is darker than his hair, an exception to CD’s rule in Descent [2: 319]. Encloses sample of his hair, beard, and whiskers.

On some errata in Descent.

Sends extracts from a statistical study giving proportion of sexes in [population of] Netherlands.

Comments on Descent.

Reports a case of protective coloration of bugs on Tilia

and observations on frogs fighting [see Descent, 2d ed., pp. 281, 350].

Encloses drawings of chicken feet.

Thanks CD for Origin, 5th ed.

Comments on reviews of Descent by the Duke of Argyll and A. R. Wallace.

Lists the Darwinian professors at Jena.

WP’s work shows external ear to have no physiological functions.

W. Müller’s book not yet arrived. Will send Müller’s next works.

J. S. Mill’s account of the moral sense in Utilitarianism [1863] appears muddled. [See Descent 1: 71 n.]

CD’s photographs have been sent to [J. W. A.] McDonald, the sculptor, who will make a marble bust for the Liberal Club of New York and a bronze or plaster one for sale; CD will receive a copy. CD has been elected an Honorary Member of the Club, and

CB asks whether he could give them a few words of advice on a practical method of biological study for beginners.

Suggests aesthetic sense in animals is merely secondary to sexual selection.

Expressions in attitudes of prayer and adoration.

Points out errata in Descent.

Writes to HED for fear of tiring CD and to pass on, if she deems suitable, her view that there is no distinction to be made between self-regarding and other-regarding virtues.

Sexual differences in sloths. J. G. Wagler article on sloths [Isis 24 (1831): 604–12].

Encloses notes that illustrate apparent intelligent reasoning by a dog which tricked an adversary, and by an elephant peaceably enduring a painful operation.

Apologises for shortcomings of his argument in earlier letters, explaining he has had little scientific education, but a life-long interest in progressive development. Resumes theorising.

A friend with similar interests has asked to be introduced to CD, as he has some facts that will amuse him.

Corrects error in his letter [7652] about date of Wagler article in Isis. Wagler said it was females that had the yellow dorsal spot.

Comments on discussion of residual organs in Descent [ch. 1].

Describes his ability to contract the platysma myoides at will.

Suggests reason for loss of voluntary movement of ears in men and monkeys.

Discusses loss of voluntary movement of ears in man and monkey.

Sexual selection in deer.

Assemblies of black cocks.

Nests of spotted flycatcher.

Corrects CD on his assertion that the platysma myoides "cannot voluntarily be brought into action" [Descent 1: 19].