In compliance with the suggestion of J. J. S., I may note that what I
suppose (since reading his communication in "N. & Q.") to be a "plague
stone" is to be seen close to Gresford in Denbighshire. I met with it
last summer, and could not then imagine what it could be. It is a large
hexagonal (I think) stone, with a round cavity on the top, which
certainly was full of water when I passed it. This cavity is pretty
deep, and the stone must be nearly three feet high, by from two to three
across. I regret I made no measurements of it. It is situated about a
quarter of a mile from the town on the road to Wrexham, under a
wide-spreading tree, on an open space where three roads meet. Should
this be seen by any Gresfordite, perhaps he would send you a more
accurate description of this stone, with any legend that may be attached
to it.