THE WALL GARDEN 123 



should be built in exactly the same way as 

 described for the retaining wall, and the stones 

 must slope back so as to catch the rain. 



It will be found a good plan if about 

 6 inches of stones are laid in the bottom of 

 the wall to act as a drain, and this will also 

 reduce the chances of heavy rain affecting its 

 stability. 



In this case also it is advisable, when cir- 

 cumstances permit, that the planting be done 

 simultaneously with the building. The soil 

 in the centre should be filled in as the stone- 

 work progresses, and should be well rammed 

 home and made solid. 



We now come to the old wall which 

 requires beautifying ; and the older it is the 

 better, so long as there is no danger of its 

 collapsing and thereby burying our treasures 

 or ourselves in its ruins. 



The first thing to do is to open up as many 

 holes in its face as is consistent with its stability. 

 In the bottom of these holes it is a good 

 plan to place pieces of slate or flat stones, 

 tipped up in front and slightly protruding, say 

 about i to ^ inch, in order to catch the rain ; 



