Discusses wear and tear due to glaciation and significance of this evidence for dating the glacial period. Mentions views of James Croll and Archibald Geikie on the issue.

Discusses views of Wallace, H. N. Moseley, and Croll on the mechanics of glacier movement.

Comments on Wallace’s new book [The Malay Archipelago (1869)].

Asks for a photograph of CL to be used by a society [in Serbia].

Comments on article by Wallace ["Sir Charles Lyell on geological climates and the Origin", Q. Rev. 126 (1869): 359–94].

Has finished new edition of Origin [5th (1869)]

and is back at work on sexual selection [Descent].

Cites article by David Forbes dealing with the geology of the S. American Cordillera ["Geology of Bolivia and South Peru", Q. J. Geol. Soc. Lond. 17 (1861): 7–62].

Discusses the flexures of the Cordillera, the age of the mountains, and basaltic dikes in granite areas.

Has just arrived in London, and would like to visit the following morning at breakfast time.

Takes "much to heart" solar evidence for short age of the earth. Cites evidence for "long endurance of our existing continents". Comments on process of denudation.