I have the honor to exhibit to this Society a brass instrument lately found by digging in the ruins of Gleaston Castle, situated in The Lower Furness, in the county of Lancaster. Lord George Cavendish the elder, whose property it is, was so obliging as to put it into my hands, as a curiosity not unworthy the notice of this Society. It is about nine inches long, and half an inch thick in the middle; one end, formed like our common hatchet, with a sharp edge, is 5 inches broad; from this end it tapers on both sides, gradually, to the other end, which is not above if inch broad, and is formed also with a sharp edge. It is for the most part finely polished, and covered with a beautiful patina, except where it has been injured by rust. It weighs two pounds, five ounces. In some respects it is similar to those instruments, called Celts, which have been found in great numbers in various parts of this island, and figured and described by various authors. These, in general, have had one end sharp, as this has; but the other has been formed into a kind of groove, or socket, to fix a handle in; and some have a loop annexed to them; but this is destitute of every thing of that kind, and seems intended to have been held in the hand only for use, whatever that use might have been; for there can be no doubt, but that, if a handle of any kind had been necessary, the workmen who formed this, could as easily have formed it with one, or with a conveniency to fasten one to it. The learned antiquaries who have seen and considered these Celts, have differed much as to the uses for which they were designed.