l62 GARDEN PLANNING 



Standing at different levels, and not as a series 

 of parallel terraces, which would be an obviously 

 artificial arrangement. Here again bold pieces 

 of rock must be used at irregular intervals, 

 constituting miniature ramparts, over which 

 some pretty trailing plant will later on make a 

 gay show, or which a delicate arenaria may 

 clothe with its velvet 

 greenery and tiny 

 white stars. 



Fig. 42. — Rocks in relation to soil 



The rock masses should not be deeply buried. 

 A good rule is that on the exposed side no rock 

 should be deeper in the soil than one fourth of 

 its height, or sufficient to effectively anchor it 

 in place. 



The rock masses should not lie higgledy- 

 piggledy, but there should be some kind of 

 relation amongst them, which is best secured 

 by giving all the flattened masses a slight tilt 

 in some particular direction, to convey the 

 idea of a naturally inclined stratification. 



