Chap. IV. 



OF ANCIENT BUILDINGS. 



209 



The section shown in Fig. 12 was taken 

 in the centre of the Basilica, and though it was 

 5 feet in depth, the natural sub-soil was not 



Mould, 20 inches 

 thick. 



Rubble with broken 

 tiles, 4 inches thick. 



Black decayed wood, 

 in thickest part « 

 inches thick. 



Gravel. 



Fig. 11. 



Section in a block of buildings in the middle of the town of 



Silchester. 



reached. The bed marked " concrete ' was 



probably at one time a floor ; and the beds 



eneath seem to be the remnants of more 



ancient buildings. The vegetable mould was 



