Agrees to pay Mr Mason as requested.

JP’s reference was clear, but seems to be different from the case cited by W. Hopkins about erratic conglomerate boulders. Asks for more details on the latter. CD does not think much of Hopkins’ paper ["Elevation and denudation of the district of the lakes of Cumberland and Westmorland", Q. J. Geol. Soc. Lond. 4 (1848): 70–98].

Thanks JP for his note and reference. CD’s paper will not deal with the general question of erratics but only their transportal from a lower to a higher level ["The transportal of erratic boulders", Collected papers 1: 218–27]. His notion is that the boulders were transported by coast-ice, not drifting icebergs, and that during the period of transportal the land was subsiding. Can JP tell him whether the raised conglomerate boulders he observed were rounded or angular?

Sends MS of his chapter on geology for Manual [Collected papers 1: 227–50]. Fears it may be too long. Does not much like it but can do no better. After hesitation, has recommended books. Defends his point that mere collection of rock specimens is "of hardly any use to Geology".

Cannot give information about hook. Fuegian women fish without hooks.

Robert Mallet’s suggestion about space for specimens on board men-of-war forwarded to Sir J. Herschel.

Describes his new microscope and its advantages for dissecting. Suggests RO might discuss topic [in his contribution to J. F. W. Herschel, ed., Manual of scientific enquiry (1849)].

Sir John Herschel has not received the parcel of "Scientific Instructions", which was posted on the 15th. He requests an accurate search at the Admiralty.