bo g4. J 
and which he direéts to be placed in the middle of the height, 
which here exadtly correfponds, the top of the precinétio being 
thirty-two feet nine inches from the orcheftra, the probable half 
of the heighth when the outfide wall was entire. 
Ir is to be obferved however that Vitruvius directs thirteen 
cells at twelve equal diftances, but here there are only nine, and 
it appeared to me that the intervals between the grooves were 
unequal. The fkilful in thefe fubjects will decide whether by means 
of this inequality of the diftances the nine might not have anfwered 
the fame purpofes as the twelve at equal diftances according to 
Vitruvius. 
Dean Mart fays there are feven ftairs communicating from 
the orcheftra upwards: this I could not perceive, as the benches 
are fo ruined it is not eafy to difcover where there were and where 
there were not ftairs. It is not unreafonable to fuppofe that there 
were ftairs leading down from each of the vomitoria, and as thefe 
were alternate in the two upper claffes of benches, (except where 
the loggia interfered in the centre and occafioned two doors in- 
ftead of one,) we may conjecture that there were feven ftair cafes 
leading from the great corridor to the benches of the people; and 
fix, alternis itineribus as expreffed by Vitruvius, defcending from 
an equal number of vomitoria, and communicating to the fecond 
clafs of benches; though J have doubts about the two next, 
the centre ones, as they feem to have been obftructed by the 
principal preciniio, and not cut through it as the others are: 
there 
