The little building which forms the subject of this paper was, until the summer of last year, one of the very few examples left to us of the adjuncts to the gatehouse of a monastery. It is now utterly destroyed, not one stone being left on another. There is no published account of it, and the only plan which shows its relation to the other conventual buildings is, I believe, the one which accompanies this paper. I have prepared the following account in the belief that the Society of Antiquaries, though powerless to prevent the destruction of the ancient buildings of the country, will not hear of their demolition without wishing to preserve for its members authentic memorials of their existence. I am indebted chiefly to Mr. Charles Lynam, of Stoke upon Trent, for the drawings which enable me to place the features of the building plainly before you.