Vlll 
INTRODUCTION. 
The coast was afterwards further examined by him in 1813 : in 
1817, I had the advantage of accompanying him to Whitby and Scar- 
borough, and was much occupied there with him also in 1820. In his 
Geological Map of Yorkshire, published in 1821, the lines of chalk, 
Kimmeridge clay, and coralline oolite, are traced with considerable 
accuracy, but the lower beds are erroneously named, owing to the 
anomalous character of the strata, which in this district represent the 
oolites of Bath. The error, however, was quickly discovered by Sir. 
Smith, and corrected in several copies of the map which I coloured for 
his friends. In the same year he shewed me some fossils * collected 
by him near Scarborough, which I immediately recognised as belonging 
to the Ivelloways rock ; but so cautious is this experienced geologist 
in the application of his own rules, that he scrupled to rely on such 
evidences of identity between two points so distant as the localities in 
Wilts and in Yorkshire; and it was not until 1824, that he satisfied 
himself by a re-examination of the cliffs at Scarborough, with a particu- 
lar view to their relations with other rocks, of the distinct existence 
there, both of this and of most of the other members of the series which 
lies between the coralline oolite and the lias. 
Having now obtained a correct view of the stratification of the 
whole coast, he laid down the details of his observations on the map. 
and communicated them in conversation to his friends ; but the only 
account of these discoveries which has been published, was in the notice 
taken of them in the Report of the Yorkshire Philosophical Society for 
1824, and in a paper f on the Geology of Cave, which contains an 
* Ammonites calloviensis, ammonites Kcenigi, and the small variety of grypliiea dilatata. 
+ Annals of Philosophy, for June, 1826 . 
