52 
CHOICE BRITISH FERNS. 
proper way is to form a solid mound of soil of the full size 
and shape desired, and then, with the aid of a trowel, to 
firmly bed the masses of burr into the mound in such a way 
that they lie firm by their own gravity. Commence doing 
Fig. 13.— Rockery. 
this at the bottom of the mound, working the soil well down 
behind each piece, and choosing the larger pieces for the 
foundation; these being firmly placed, and the soil brought . 
down behind them, the inserting of the rest will be easy. 
