Regrets that he is too busy getting his book [Variation] ready for publication to contribute an article to Fraser’s Magazine.

Discusses the Duke of Argyll’s book [Reign of law (1867)].

Cites his own views on diversity of structure and beauty.

Encloses letter from Wallace. Sexual selection: evidence advanced by Wallace.

Discusses correlation of growth.

Comments on article in the North British Review [by Fleeming Jenkin].

Discusses the evidence from physics on the age of the earth.

[Four pages of the final letter are missing, but the draft is complete.]

He had no idea that the double function of an excretory passage had played a part in the history of religion.

Discusses the reception of CD’s views at Cambridge and elsewhere.

Variation delayed by the index, but will appear at the end of the year.

No summary available.