50 George Clineh—Sculpturings of the Chalk Downs. 
the direction in which we may look for an explanation of the whole 
story of the origin and development of the valleys of the Chalk Downs. 
Excellent examples of valleys of this type are to be found in 
abundance in the North and South Downs, in the former especially to 
the south of Croydon, in West Kent, and throughout the eastern 
portion of Surrey. (See Fig. 1.) 
CROYDON 
MERSTHAM 
Fie. 1. Diagram showing complicated and sinuous Dry Chalk Valleys of the 
North Downs between Merstham and Croydon, Surrey. 
The Wet Valleys (2) are characterized by the large size and breadth 
of their passages through the Downs, and by the extensive watersheds 
drained by the rivers which now occupy them. In general outline 
and character they are not unlike the Dry Valleys, but they are 
invariably cut to a lower level in the Chalk, and in all cases, I think, 
they contain deposits of river gravel. Generally speaking, however, 
they are of less complicated form than the Dry Valleys. The following 
rivers now occupy the Wet Valleys of the district with which the 
present paper is concerned: (orth Downs) Wey, Mole, Darent, — 
Medway, Stour; and (South Downs) Cuckmere, Ouse, Shoreham River 
or Adur, atid Arun. 
