48 ROCK GARDENS 



sinking the hollow deeper, with every chance of 

 leaving it in a form that will retain water — the 

 last thing to be desired. For these reasons let 

 the rough scheme be worked out in the initial 

 stages. 



It may perhaps assist the reader and be the 

 simplest way of showing what is meant by 

 these variations in the slope of the banks, if I 

 describe one artificial valley that I know. 



This valley is made in a piece of ground 

 about 85 yards long by 35 yards broad, with a 

 fall of about i foot in 16. Owing to the cir- 

 cuitous course the valley takes, its actual length 

 is about 105 yards, with a path varying from 

 7 feet to 12 feet wide, while the banks on 

 either side vary from 5 feet to 9 feet in height. 



Particulars of the formation of the right 

 bank may now be given, beginning from the 

 lower end of the valley. 



For the first 1 5 yards or so the slopes are 

 very gradual, but increasing in gradient until 

 some bold rockwork at A (fig. 2) is reached. 

 This is almost perpendicular, and is from 8 to 

 9 feet high. Round this the path turns sharply 

 to the right, and then follows an almost semi- 



