11838.

‘ELEMENTS OE GEOLOGE.

35

CHAPTEE XXII.

JANTJARY 1838—OCTOBER 1841.

* ELEMENTS OP GEOLOGY — SEDGWICK’S LECTURE—WHEWELL’S ‘INDUCTIVESCIENCES —ANNIVERSARY AT THE GEOLOGICAL SOCIETY —DARWIN ONVOLCANIC PHENOMENA—VISIT TO NORWICH AND YARMOUTH—NEW-CASTLE MEETING — DARWIN’S JOURNAL — CORAL REEFS — ATHENÄUMCLUB—DR, FITTON’S REVIEW—HUTTON’S CLAIMS—BRITISH ASSOCIATION,BIRMINGHAM—VISIT TO SIR ROBERT PEEL—TRAVELLING IN UNITEDSTATES —RAPID GROWTH OF THE COUNTRY—NIAGARA GEOLOGY.

To Professor Sedgwick.

January 20,1838.

My dear Sedgwick,—I have been very busy since myreturn from Denmark with my ‘ Elements of Geology,’ whichI Pope to get out before the summer, and have just finishedabstracting from Murchison’s sheets, which I have read withno small pleasure, a short account of the Silurian rocks andtheir fossils. I am now upon your Cambrians, and as I givea few woodcuts of fossils in each group I should have liked togive a few of theearliest onesif possible. Phillips, in his newtreatise in Lardner,has given us a fewSnowdonian fossils of hisown collecting in 1836, and I would of course select others,that I might not interfere with his, and might give as muehas possible original information to the public. I should,however, be content if there were any figures published ofwhat you consider true Cambrian organic remains of anyorder of animals, to copy them in my small reduced wood-cuts, just to give novices an idea of the generic forms, if Ican do no more. I believe there are some specimens, fromSnowdon and elsewhere, of Cambrian fossils in the Geolo-gical Society’s Museum, but if you can put me in the way offurnishing a page of woodcut figures, it will be doing me agreat Service.