Curious to read what CD will say on man and his races.

Has CD seen Ludwig Rütimeyer’s Ueber die Herkunft unserer Thierwelt (Rütimeyer 1867c)?

Discusses J. F. W. Herschel’s theory of active volcanoes existing at the junction of continents and the sea.

Comments on Huxley’s address ["Geological reform", Q. J. Geol. Soc. Lond. 25 (1869): xxxviii–liii].

Physicists have ignored variation in sea-level in calculating effects.

Doubts if sun only source of heat.

Notes average depth of sea is 15 times height of land.

Criticises CD’s concept of permanent continents.

Sedimentary strata of Alleghenies must have derived from continent located where Atlantic is. Thinks enormous amount of denudation, submergence, and elevation may have accompanied relatively insignificant organic changes.

Has been looking for something about crop rotation in Origin and Variation.

Comments on Tyndall’s [Presidential] Address at Belfast meeting [of BAAS] and praise of CD’s work there. Mentions criticism of Belfast clergy.

CL saw some crustacean footprints while in Ireland.

Response to Origin. Praise for summary of chapter 10 and chapter 11.

The dissimilarity of African and American species is ‘necessary result of “Creation” adapting new species to the pre-existing ones. Granting this unknown & if you please miraculous power acting’.

C. T. Gaudin writes of Oswald Heer’s finding many species common between Miocene floras of Iceland and Switzerland. Interesting for CD’s migration theory.