Thanks for ACR’s Physical geology [5th ed. (1878)]; delighted with its success, proving there is a large body of men in England capable of appreciating sound geological science.

Notes on worm action, and CD’s questions concerning source of nutriment for worms in ACR’s courtyard [see Earthworms, pp. 192–3].

Pleased ACR likes Origin. Every geological believer is most important. A long, stiff battle is ahead for the new doctrine.

Would like to hear ACR’s new views on origin of mountain lakes, but cannot stand the hot, late meetings [at Geological Society].

On ACR’s paper on glacial origin of lakes. CD thinks it is correct. Suggests further investigation to corroborate it. His only doubt has to do with areas of great activity.

On ACR’s view of cause of glacial period: CD did battle with Hooker on same point.

T. F. Jamieson has smashed CD’s Glen Roy marine theory in splendid style.

Thanks ACR for Catalogue; pleased some of his volcanic specimens have been included.

Will review T. F. Jamieson’s paper on Glen Roy. Knows the facts and knows too well that he [CD] is everlastingly smashed.

Interested in ACR’s Presidential Address [Q. J. Geol. Soc. Lond. 19 (1863): xxix–lii] on the breaks in succession (of formations). Hopes ACR will provide a diagram of breaks, with the percentage of fossils that "pass upwards", i.e., continue to appear.

Horrified at Huxley’s geology.

Wishes ACR would discuss "creeps".

Thanks for Geological survey of North Wales [1866]. Longs to return to the mountains with which he was once familiar, but did not understand.

Received and read ACR’s Physical geology. Places him at head of the subaeria denudationists. Unfortunately CD confounded William Whitaker’s article with ACR’s views and gave Whitaker credit for first producing the evidence. Will rectify it now. Has eliminated the rubbish he wrote on the Weald and will add a paragraph on importance of subaerial denudation.

Thanks ACR for papers.

Glad present situation of our continents has been confirmed.

Wishes ACR would prove his view of origin of Red Sandstones, which many dispute.

Requests further information on subsidence of flagstones because of action of worms.

Further details of pavement that sank from action of earthworms. There were plenty of castings, which first led him to think worms were involved.

Responds to CD’s queries about the thickness of various geological formations. [See Origin, p. 284.]

Responds to CD’s queries concerning faults; is sending sections of the kind he wants. The Merionethshire fault with a downthrow of 12000ft. [See Origin, p. 285.]

No doubt about worm-holes in the Long Mynd, and they are certainly lower than J. Barrande’s primordial zone. Fossils in Laurentian gneiss.

In his paper for Geological Society ["Glacial origin of certain lakes", Q. J. Geol. Soc. Lond. 18 (1862): 185–204] he will prove that all the lake-basins of the Alps were scooped out by glaciers.

Sends his paper [on glacial lakes, see 3450]. Falconer attacked it. Falconer thinks Himalayas confound the theory, but Hooker writes that it explains the absence of lakes there.

Sends 3d ed. of catalogue of rocks [A descriptive catalogue of the rock specimens in the Museum of Practical Geology (1862)].

T. F. Jamieson’s paper on the parallel roads of Glen Roy to be read 20 January. Asks whether CD will be a referee.

Glad CD likes his Presidential Address to Geological Society [1863].

Will continue the practice [of discussing the break in succession of strata].

Has devised a diagram showing number of genera and species in each geological formation and the number that pass from formation to formation.

Describes the glaciated terrain of S. Wales.

Sends 2d ed. of his Physical geology [1864]; hopes that he will burn the 1st because of its errors.

ACR is convinced he is right about denudation of the Weald.