to the north-east. The sides of this drain were built of
bonding-tiles and roofing-tiles were used to floor it; presumably,
similar tiles would have been used to form a cover, but none were
found in situ. Its sides were made waterproof with a thick
coating of opus signinum (Plate X).
About halfway along its course outside the south-east wall of Room
34, the drain channel deviates slightly to the south-east and
becomes slightly wider; it continues under the south corner of
Room 33, turns a little further to the west to avoid the thick
floor of Room 31, and then joins the earlier drain from this room
at a point a little beyond its west corner (Plate
IV). Though this drain is known to continue beyond Room 37,
its beginning is yet to be discovered; it is quite certain that it
was already in existence before the building of the tessellated
floor over it in Room 37, and that it served as an outlet for the
wooden pipes leading to it through Rooms 33 and 34.
Period III: c. A.D. 150-290. (a) The Bath Building
The massive bath building of this period has now
been almost completely exposed, with the exception of the later
furnace still to be examined north-west of Rooms 20 and 23.
Room 25 is the original stokehole of this
period and, in effect, a reconstruction of part of the earlier
stokehole, Room 40. It measured 11 by 9 ft. 9 in.; its north-west
and north-east walls (2 ft. in width) were new constructions, as
was the south-west wall which is the full 3-ft. thickness of the
bath building just beyond the flue of the furnace. The north-east
wall was abutted against the north-west wall and necessitated the
partial removal of the north-east wall of the earlier Room 40. The
door of Room 25 lay near the north corner and was found containing
a large accumulation of soot and ash; further ash had been raked
outside the door (Section K-L; Layer 35).
The flue of the stokehole had cheeks built of large river boulders
set in clay and some bonding-tiles; its floor was of clay baked a
deep brick-red colour and laid on a foundation of broken tiles
resting upon the ash of the earlier flue of Period II. The flue
itself was slightly longer than the earlier one of Period II and
may have had a boiler placed over it; there was enough space for
it and, indeed, the whole area had all the appearance of having
had water-tanks placed over the flue, but of these no direct
evidence was found (Plate VI).
This furnace is undoubtedly the original source of
heat for the hypocausted rooms to its south-west as shown by the
single flue pierced through the south-west wall of Room 42. It is
possible that no provision for another stokehole had been made in
the original plan of the bath building, and that Room 25 proved
insufficient for the needs of such a large heated area, thus
necessitating the construction of another furnace; but, at
present, this is a matter for surmise.