274 PHILOSOPHICAL TRANSACTIONS. [aNNO 17 17, 



and west; its length is 17 feet 4 inches; its breadth 11 feet. At first it seemed 

 to have been bounded with a thin brick set on edge, about an inch above the 

 tesserae, as straight and even as if shot with a plane, and as well cemented as 

 if it had been one entire brick. But when the outside of the pavement was 

 broken up, we found that, instead of bricks set on edge, as was imagined, it 

 was bounded with a border of bricks laid flat, with their ends next the tesserae 

 turned up. The thickness of these bricks was an inch and a quarter; their 

 breadth between 11 and 12 inches; the length full 15; and, before they were 

 turned up at their ends, could not have been less than 17 inches. They were 

 very firm, and not in the least warped or cast in the burning; when broke, 

 their substance was fine and well mixed, of as uniform and clean a red colour, 

 as a piece of fine bole, excepting at the ends, where turned up, they were all 

 over covered with a plaster, the same which Vitruvius calls the nucleus, half an 

 inch thick; so hard, entire, and even, that it seemed as one stone, quite round 

 the pavement. 



Next within the bricks, there was a list or border of white tesserae, 13 inches 

 broad; within that, a list of brown tesserae, somewhat darker than a whet- 

 stone, and somewhat lighter coloured than the touch-stone, 4 inches broad ; 

 then a list of the white, 5 inches broad; next within that, another list of the 

 brown, 4 inches broad: all the rest of the pavement was set with white tesserae, 

 without any ornament or figure, which looked very neat and clean. 



When the ground about the pavement was dug up, on the north side was 

 discovered an entire bath, l6 feet long, 5 feet 9 inches broad, and 1 feet 9 

 inches deep. It was filled with rubbish of buildings, which seemed to have 

 been burnt, viz. hard mortar adhering to pieces of Roman bricks, squared 

 stones, and headed flint, mingled with ashes and coals of wood. From the 

 northwest corner of the pavement was the passage into the bath, 3 feet 3 inches 

 wide; at which place the bricks that bounded the pavement were not turned up 

 at their ends, but lay even with the tesserae. At the distance of 15 inches from 

 the tesserae there was a fall of 2 inches, to the landing place out of the bath ; 

 the landing place was also 3 feet 3 inches long, and 1 feet 2 inches broad; from 

 thence, by two steps of stairs, was the descent into the bath, the length of the 

 steps the same as of the landing place; the breadth of each step was 1 1 inches, 

 and the height of each a little more than 10 inches; the lowest step was 20 

 inches from the farther side of the bath. The whole work was very compact, 

 and exactly well made, not in the least injured by time, nor the violence it 

 underwent when filled up. 



The pavement was secured on every side, and its edges rested on a very firm 

 and neat built wall, made of Roman brick, squared stone, and headed flint; 



