142 GARDEN DESIGN 



Foundations of walls in gardens have to be 

 taken deeper than for purely building purposes, 

 owing to the frequent disturbance of the soil near 

 them. Accordingly 3 ft. should be allowed in- 

 cluding 9 in. of concrete, resting on firm subsoil 

 and with a base twice as broad as the wall. The 

 width is changed by equal steps on both sides, not 

 more than 2j in. wide. The same strength may 

 be obtained by building on a series of arches set 

 on firm concrete bases (as for a vinery where the 

 vine roots are to be in an outside border), but it 

 is no advantage for fruit trees to be able to root 

 across under the wall, and the plan is not often 

 followed. 



TREILLAGE 



TRELLIS-WORK, or treillage, has been a recognized 

 form of garden architecture from the earliest times. 

 The word treillage is more satisfactory than trellis, 

 which is commonly used for any kind of lattice 

 work, while treillage denotes a combination of 

 the latter with posts and rails in a definite design. 

 Frescoes at Pompdi represent various applica- 

 tions of the art to shrines, aviaries and summer- 

 houses. It was common in Roman gardens. The 

 ancient Egyptians knew its decorative value, and 

 modern Egypt still makes characteristic patterns 

 with short carved lengths and bead-like ornaments. 

 The gardens of China and Japan abound with 



