Sends two papers ["On the physical relations of the new red marl", Q. J. Geol. Soc. Lond. 27 (1871): 189–98 and "On the red rocks of England", Q. J. Geol. Soc. Lond. 27 (1871): 241–54] bearing on the continuance of generic and specific terrestrial types, in areas of Europe and elsewhere, that lasted from the Upper Silurian to the Lias.

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.

Glad CD agrees with his views as much as he does. Not surprised that his red rocks [Red Sandstones] ideas are disputed. The red marls of Auvergne support his inland water theory.

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

Sends description and measurements of the 18th century courtyard pavement of his house, the stones of which have sunk as a result of earthworm action [see Earthworms, pp. 192–3].

Further details and measurements of the stones in the courtyard pavement for CD’s investigation of earthworm action.

Thanks for 3rd edition of ACR’s Physical geology and geography of Great Britain (A. C. Ramsay 1872).

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.