Scenery of Eng land. 351 



add much to the general knowledge which I have 

 already endeavoured to express, viz., that England is 

 mountainous and very hilly in the west and north, in 

 Devon, Wales, Cumberland, and from Derbyshire con- 

 tinuously all through to Scotland, because of disturb- 

 ances and great denudations ; and that it consists of 

 undulating plains and of tablelands in the central and 

 eastern parts, because the strata there are generally 

 much flatter and softer, and because they have been 

 denuded in such a manner, that immense tracts of 

 Chalk and Lower Grreensand, in the Weald and in the 

 middle and west of England, have been cut away by a 

 slow process of gradual recession due to atmospheric 

 influences, and thus it happens that their edges now 

 form long escarpments, which are still receding in the 

 direction of the dip of the strata, and therefore at right 

 angles to the slope of the scarp. 



