About a dog that acquired habits from a cat and her kittens.

Information on the publishing history of a book [J. C. Lavater, Physiognomische Fragmente, 4 vols. (1775–8)].

Since it is difficult to catch the expressions CD wants, OGR is posing himself.

Is sending copy of Descent.

Thanks for copy of WP’s book [Die Blutkrystalle (1871)].

Discusses shape of external ear.

Mentions some photos relating to expression.

Encloses two questions he hopes MF can answer: the mechanism of transmission by nerves; and the mechanism by which contemplating part of our body, we become conscious of its existence

"If you feel astonished at my bringing man & brutes so near together in their whole nature (though with a wide hiatus) I feel still more astonished, as I believe, at your judgment on this head. I much wish you had enlarged your concluding sentence a little so as to say whether you consider the ordinary mental faculties so distinct, or whether you confine the enormous difference to spiritual powers including the moral sense.––"

Sends his paper on locusts ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)]. The effect of the growth of forest land on their increase; meteorological and climatic effects.

Also observations made on increase in mice as a result of increase of locusts, on whose eggs they fed, and of increase of weasels that fed on mice.

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

Sends German edition of Descent, vol. 1. Expects good sale. Hopes CD will offer him additional books to publish.

Believes heliotype process is best for book illustrations. Has sent copies [of Descent] to Loescher and Carus.

Is working on an estimate for the cheap [6th] edition of the Origin.

The Times review has not hurt sales of Descent.

Concerned with photographic processes for illustrations [for Expression].