( 558 ) 
Very firm 23 Inch Walls contiriued every wav (ro the 
fatcher eflds of which we did not irace), whofe Founda- 
tions were as low as that which iupported rhe Pave- 
ment; To that to the depth of fix Foot the Ground W’as 
fill’d w’iih fuch Rubbilh as was taken out ot the Bath. 
The Bricks in this Rubbtfli, which W’ere all broke, had 
fcveral degrees of thicknds, from three Inches to a little 
more than one Inch : fome had one of their Sides 
wav’d as in Fig.x\ fome Fretw'ife as in F'tg. 3 others 
had Roles on them well imitated ; we found ailb two 
forts of channel’d Bricks ; the one like a Trough, the 
Channel three Inches broad, and as many deep, the 
Brick it felf an Inch and a half thick : The otl er fort, 
had a Cylindrical Channel ; fo that when two were ciape 
together, they form’d a hollow Cylinder of three Inches 
l^iameter.. Thefechannell’d Bneks being all broken, their 
Length when whole is uncertain, as is the Die they 
ferv’d to ; whether for Paflages to conveigh Water ; or 
whether they were placed in the Walls to dillribute 
Heat throughout the Building, as was ufoal in the an- 
cient Strudures at Rome, 
’Tis farther obfervable, when the Ground was open'd 
thefecond time; that off from the Soudt-Wefi corner of 
the Pavement, which the Letter G Ihews ; five Foot low- 
er than the Surface of the Pavement, there was dil’co- 
ver’d a large Space (to the end of which we did not 
fearchT paved witli Brick, eleven Inches broad, almofl: 
one and a half thick, and fifteen long ; fubitand lly 
was it pav’d ; for it had two Coutfes of this Brick. 
There was half a Foot of Mortar under the lower Courfe; 
and about an Inch of Mortar between the two Courfes ; 
thefe Bricks alfo w'ere perfecftly well made,* but on 
the under Side of each, were two Knobs, about rhe 
fize of half a Wallnuc ; fix’d on them as may be guefs’d, 
to 
