[Illustration: GLASS BALL, PERFORATED AND MOUNTED IN METAL, SO THAT IT CAN BE SUSPENDED AND USED FOR OCCULT AND CURATIVE PURPOSES. Period of about tenth or twelfth century. Collection of Sir Charles Hercules Read.] [Illustration: BALL OF JET, PERFORATED, MOUNTED IN METAL, SO THAT IT CAN BE SUSPENDED AND USED FOR OCCULT AND CURATIVE PURPOSES. Period of about tenth or twelfth century. Collection of Sir Charles Hercules Read.] [Illustration: EYE AGATE, SHOWING A NUMBER OF CIRCULAR MARKINGS. Mounted in metal and kept in a box, as a votive or curative stone. About fourteenth century. British Museum. (See page 149.)] One of these treats of a marvellous “glass” made by the friar, in which events happening at far-distant places were mirrored. On one occasion two young men, between whom the friendliest feelings existed, came to Bacon and requested him to let them see in the mirror what their fathers were doing at the time. The friar consented, but the experiment, while successful, was the cause of a terrible misfortune. The story is as follows: The Fathers of these two Gentlemen (in their Sonnes absence) were become great foes: this hatred betweene them was growne to that height, that wheresoever they met, they had not onely wordes, but blowes. Just at that time, as it should seeme, that their Sonnes were looking to see how they were in health, they were met, and had drawne, and were together by the eares. Their Sonnes seeing this, and having been alwayes great friends, knew not what to say to one another, but beheld each other with angry lookes. At last one of their Fathers, as they might perceive in the Glasse, had a fall, and the other, taking advantage, stood over him ready to strike him. The Sonne of him that was downe could then containe himselfe no longer, but told the other young man, that his Father had received wrong. He answered againe, that it was faire. At last there grew such foule words betweene them, and their bloods were so heated, that they presently stabbed the one the other with their Daggers, and so fell downe dead. The sceptre of the Scottish regalia is surmounted by a crystal globe, two inches and a quarter in diameter, and the mace by a large crystal beryl. In former times these stones were regarded as amulets and their use was traced back to the Druids. Sir Walter Scott tells us that in his time they were still known among the Scottish Highlanders as “Stones of Power.”[278]