INTRODUCTION. Xlll 



account of the continuation of this range, examined by the Rev. Wm. 

 Vernon and myself, where it emerges from under the chalk hills. 



Whilst Mr. Smith was occupied in these researches, it was my good 

 fortune to receive the directions of the Yorkshire Philosophical Society 

 to arrange, as accurately as possible, in the order of stratification, the 

 fossils in their extensive collection. I was delighted to find, in the 

 prosecution of this duty, innumerable proofs of the truth of Mr. Smith's 

 views respecting the distribution of organic fossils, and saw very clearly 

 that many of the strata in the north-eastern part of Yorkshire might be 

 confidently identified with well-known formations in the south of 

 England. For this purpose, I drew up several comparative catalogues 

 of fossils, which, under an amended form, will be found in the following 

 pages. I began also in 1824, with the advantage of Mr. Smith's society 

 on the coast, the Section which is now submitted to the public ; and 

 having engaged to deliver an extended course of Lectures on Geology 

 before the Philosophical Societies of Yorkshire, Leeds, and Hull, I re- 

 sumed the task in the autumn of 1825, and measured and examined in 

 detail all the cliffs from Redcar to Bridlington. The Section, which I 

 was thus enabled to draw on a very large scale, was exhibited and 

 minutely explained to the members of these institutions ; it was shewn 

 to Mr. Murchison on his way to Brora ; and a copy of it was used by 

 M. M. Ouenhausen and Von Decken in their examination of the York- 

 shire coast. 



In October, 1827, I again surveyed and measured the whole coast 

 from Redcar to Scarborough, and prepared sections of certain parts 

 for M. Adolphe Brongniart, as well as drawings of some remarkable 

 fossil plants ; and in June, 1823, the labour of admeasurement was 



