AND OTHER WATER WAVES 225 



"It is at all times a naturally rapid river, 

 winding its way over large masses of rock and 

 boulder, and the most accomplished swimmer 

 would have but little chance of saving himself. 



" In the neighbourhood of Barnard Castle, a 

 few miles below that town, we generally allow seven 

 hours for the river to come down after rain in 

 one's locality ; and such calculations are very near 

 the mark, but, of course, occasionally after heavy 

 thunderstorms above Middleton and otherwise the 

 wave descends without any warning whatever to 

 anglers and others in the lower districts. As there 

 is sometimes an entire absence of rain locally, these 

 sudden and sometimes unexpected spates make the 

 Tees in summertime dangerous even to the most 

 experienced." 



The Ure is somewhat similar in general character 

 to the Tees. At Aysgarth it is well known to 

 lovers of the picturesque on account of the beau- 

 tiful Fall, or " Force." The pavement -like rock 

 bed of the river outcrops horizontally, and the depth 

 of the river is fairly uniform in cross -section, 

 although longitudinally it consists of pools and 

 shallows. The Tees also, where I have seen it 

 near Barnard Castle, was of uniform depth (cross- 

 wise), owing to the nature of its bed of hard 

 and homogeneous rock. I may note in passing 



