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)].

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.

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.

Mentions expected birth of child [Henrietta Emma].

BAAS meeting.

Comments on letters from G. R. Waterhouse and William Lonsdale.

Describes survival of apparently "fossil" seeds sent by W. Kemp.

Is at work on MS [of Volcanic islands].

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

Description and defence of his view of the tosca in Banda Oriental, along the Rio Uruguay and at the Rio Negro, taking issue with A. D. d’Orbigny. Refers to the pumice in the Patagonian Territory. Two tables show the layered tosca formation along the Uruguay.

Thanks CL for his book [The student’s elements of geology (1871)].

Is correcting proofs [of Descent].

Asks about CL’s new book [Travels in North America (1845)].

Discusses views of A. D. d’Orbigny on elevation.

Mentions reading W. H. Prescott [History of the conquest of Mexico (1843)].

Asks Lyell to put a question to CD: "To what far distant origin can the configuration of the skin surface [the symmetrical but different curves] at the last points of the fingers and toes be traced?"

Remarks on fossils described in A. D. d’Orbigny’s Voyage dans l’Amérique méridionale.

Asks CL whether he has talked with John Murray concerning 2d ed. [of Journal of researches].

Mentions conversation with Hugh Cuming about South American shells. Has had G. B. Sowerby (elder) look at some specimens.

Sends, for signature, a statement approving change in rules of the Leopoldino Academy [Dresden] to be forwarded to CD to sign.

Comments on CL’s Principles of geology, 11th ed.

Discusses natural selection in man.

Comments on migration as a factor in evolution. Suggests pamphlet by August Weismann on the subject [Über den Einfluss der Isolierung (1872)].

Thanks him for interesting letter from a Mr Wood on heredity in fruit-trees.

Comments on enclosed discussion of S. American geology by Agassiz. Mentions elevation of Patagonia and glaciation.

Hopes that Charles Lyell has enjoyed his excursion.

Arranges a visit to CL.

Sends the first part of Journal of researches [2d ed.]. Explains his dedication of book to CL. Describes revisions.

Has received CL’s book [Travels in North America, 2 vols. (1845)].

Offers condolences on the death of CL’s wife.