Will send JP a map as requested. Asks for a ticket to one of JP’s lectures.

He encloses an unidentified paper received from R. I. Murchison the previous day.

Is unable to provide information about Dr Du Gard.

Appreciates the maps of Glen Roy sent by WB. Would welcome the opinions of WB and Louis Agassiz concerning the parallel roads but cannot give up the idea of their marine origin.

Asks for the reference in which JP states that some erratic boulders came from a lower to a higher level. CD is writing a paper ["Transportal of erratic boulders", Collected papers 1: 218–26] in which he believes he has the true explanation. Would like as many instances, with details, as possible.

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?

Some geologists (especially H. T. De la Beche) doubt boulders have really been carried above their parent rock, but rather thought they were left behind as a result of denudation. Asks JP’s view of this, which he can quote. Supposes he will be well abused for his paper, but is resolved "not to show a white feather".

Thanks JP for beautiful book [? The rivers, mountains and sea-coast of Yorkshire, 2d ed. (1855)].

Acknowledges the honour that the Council [of the Geological Society] have conferred upon him [award of Wollaston Medal]. Will attend the anniversary meeting if his health permits, but cannot attend the dinner.

His doctor urges CD most strongly not to expose himself to the excitement and fatigue of receiving the [Wollaston] Medal. He will ask Lyell to receive it on his behalf.

Sends Origin to JP. Says it is as yet only an abstract. Fears JP will "fulminate anathemas" against it. Asks him to read it all straight through, otherwise it will be unintelligible.

Is not so foolish as to expect to convert anyone. CD remembers how many long years his own conversion took. Hooker "has completely given up species as immutable creatures".

Though many facts of palaeontology may be against his theory, CD begs JP to consider whether a theory wholly false could explain several classes of facts – which CD enumerates.

Thanks JP for copy of his Life on the earth [1860].

Is sorry, but not surprised, to see that JP is "dead against" CD on the Origin.