In August 1770, a stone was found in digging a cellar at York, at a place called the Friar's-Garden, one of the highest parts of the city. The workmen, in their progress, came to the foundation of an old building of Roman brick, the mortar or cement of which, was so hard as not to be penetrable by the Sharpest tools, the bricks breaking before the mortar. This part of the foundation was a segment of a circle: the remainder of it being under the adjoining house could not be traced out; there is reason, however, to apprehend, that the whole composed a rotunda. In digging the ground a little further, within the segment of the circle abovementioned, the men found a large gritstone, three feet long, two feet one inch broad, and eight inches thick.