20 TREATMENT OF SLOPING GROUNDS. 



It will be seen by this brief explanation that rockwork 

 must be constructed on nature's lines after a careful study 

 and analysis of nature's methods of doing such work. 



The illustration of the next bank shows the way to treat 

 sloping grounds where the steepness is not so great. Here 

 larger areas are open and longer gullies appear where the 

 sweep of the water has apparently had more opportunity to 

 leave broad marks. 



The placing of these rocks requires much art. It will 

 be seen that they are not set parallel with each other, but 

 that they have a likeness of setting, as if a gully had been 

 opened behind them, and that its course had determined 

 the dip and set of the rocks. The gullies naturally have 

 also the same general similarity, although throughout the 

 whole arrangement extends the greatest diversity of for- 

 mation. 



Thus far I have spoken of and illustrated entirely arti- 

 ficial rockwork, and of course artificial rockwork may take 

 special forms. It may be a bank to be treated with rocks, 

 as we have seen, or it may be a group of stones to protect a 

 tree, around which earth is to be filled. The curves of drives 

 may need rocks to fend off carriage-wheels, or there may 

 be an extended terrace, in front or on the side of the house, 

 that must be held in with rocks. In each and every case 

 the simple object to be sought is to make the effect look 

 entirely natural, as if it had been brought about in long 

 course of time under the stress of wind and rain. 



There is also the second or semi-artificial rockwork to 

 be considered, the kind that is a supplementary rockwork 

 to that already standing naturally in place. Instances of 



