A HISTORY OF DERBYSHIRE 



Roman military works, the angles of plotting were not strict right angles, 

 and the opposite sides are therefore not mathematically parallel. The fort 

 was defended by a stone wall 6 feet thick, faced with courses of gritstone 

 and filled inside with rubble and concrete in the usual Roman fashion 

 (fig. 12.) In the middle of the two shorter sides and near the middle of 

 the two longer ones were the four gateways not yet excavated. The west 

 corner of the fort and presumably each of the other corners contained a 

 turret. What manner of fosse encircled the rampart is unknown. 



PLAN 



.-v^._ . .....>l,. ... ... '-> i 



OF FEET 



FIG. 10. PLAN AND SECTION OF SUNK CHAMBER OR VAULT IN THE FORT AT BROUGH. 

 (Derbyshire Archaokgcal Journal?) 



Of the interior little has been uncovered. We know only the 

 outline and one detail of the central building or headquarters. This 

 building was found in 1903 to be an oblong, though not quite mathema- 

 tically rectangular, and to measure, roughly, 60 feet by 85 feet. Its back 

 wall showed traces of two periods of building. Of its internal arrange- 

 ments only one part has been examined. This is a sunk pit or vault, 



204 



