TUBS IN WATER-GARDENS 129 



let into this supply barrel from a height of a foot or 

 so, and will be all the better if it can come through 

 a rose-like nozzle that will help to aerate the water 

 before it reaches the barrel, in which it should also 

 stand some hours (the longer the better) before it is 

 let into the sunk tubs. One whole barrelful would 

 probably be enough to partly renew, or at any rate to 

 refresh, the contents of the water and bog tubs. 



It would be a convenient arrangement for the sunk 

 tubs to follow the line of path on one of its sides, with 

 space round them for bog-plants ; thus forming the 

 section for water-plants of a small rock-garden, whose 

 drier raised portion would be on the other side of the 

 path. If the little garden is made in level ground, it 

 will be well to excavate the space of the path and the 

 boggy area by its side to a depth of some eighteen 

 inches, and to throw it up on the other side, and to 

 arrange the pathway to come into the lowered space 

 from either end by some shallow rock steps of the kind 

 shown at p. 14. 



The space where the tubs and surrounding bog- 

 plants are to be, should be further excavated to quite 

 half the depth of the tubs ; then these must be nicely 

 let in to their proper depth, and adjusted with the 

 necessary fall (about an inch) from one to the other, 

 though each should stand quite level. Prepared soil 

 will then be filled in to the level of the rims. It 

 should be of peat and leaf-mould, with one stiffer 

 corner for the few bog-plants that like loam. Then 

 the rims of the tubs should be closely covered with 

 flat stones that just overlap, laid in such a way that 



