sets of strata which run from north to 

 south through the island of Great Britain, 

 as far as I am acquainted with them, lies 

 the Lyas at no very great distance ; 

 though, indeed, with two or three sets 

 of strata, viz those of Gunnerby and 

 Foston, between them ; these run into 

 Leicestershire to the south, and to where 

 the Trent falls into the Humber, and the 

 upper part of the Humber to the north, 

 the Lyas being the lowest of all these 

 sets of strata, and all of them lying below 

 the yellow limestone 1 in order, but 

 nowhere having any coal near them ; 

 whereas our yellow limestone 2 has no 

 Lyas anywhere under it or near it to the 

 westward of it, but on the contrary, 

 everywhere coal very near the western 

 edge of it, all the way from Leicestershire 

 by the edge of Nottinghamshire and 

 Derbyshire, and a long way into York- 



1 [Now known as the group of Lower Oolites.] 



1 [That is, the Magnesian Limestone of the 



Permian system which stretches as a broad band 



from near Nottingham to the mouth of the Tyne, 



a distance of 1 50 miles.] 



56 



