Around the stone in the church of Santa Sabina a curious legend has gathered. The sacristan, a Dominican friar of the neighbouring convent, is in the habit of telling the visitors that the devil one day, while St. Dominic was kneeling on the pavement as usual, hurled the huge stone in question, with his utmost force, against the head of the saint; but, strange to say, it either missed him altogether or failed to do him any injury, the saint going calmly on with his devotions as if nothing had happened. On the stone in the church of Santa Maria in Trastevere there is an inscription in Latin, informing us that it was fastened round the neck of St. Calixtus, the Bishop of Rome, who, after having been scourged during an outbreak of pagan hostility, was thrown out of a window in his house in the Trastevere, and flung into a well. The stone in the Basilica of S. Lorenzo is connected with the sufferings and death either of St. Justinian or of St. Stephen, the proto-martyr, who was stoned to death in Palestine, and whose remains, miraculously recovered, are supposed to rest in the crypt below, along with those of St. Laurence. All these relics are devoutly worshipped, and they are believed to cure diseases, and to protect against evil those who touch them. Examining the martyr-stones more closely, we find abundant evidence to confirm the account which is usually given of their origin, viz. that they were first used as Roman measures of weight. Several of them have inscribed upon their upper surface the names of the quaestors or prefects who issued them, as well as the number of pounds and ounces which they represented; the pounds being distinguished by figures, and the ounces expressed by dots or small circles. Numbers of such ancient Roman weights of stone, similarly inscribed, may be seen in the Kircherian Museum in the Collegio Romano. One specimen bears an inscription which signifies that, by the authority of Augustus, the weight was preserved in the temple of the goddess Ops, the wife of Saturn, and one of the most ancient deities of Italy, where the public money was deposited. Montfaucon, in the third volume of his learned and elaborate work on Antiquity, has a plate illustrating a number of characteristic specimens of these weights from the cabinet of St. Germain's. This previous use would lead us to suspect that all the stones in the Roman churches did not figure in scenes of martyrdom. Some of them, indeed, were found in the _loculi_ or graves of the Catacombs; but this circumstance of itself does not prove that the body interred therein had been that of a martyr, and that the stone had been employed in his execution. We know that the early Christians were in the habit of depositing in the graves of their friends the articles that were most valued by them during life. And hence, in the Catacombs, a singular variety of objects have been found. Stone weights, therefore, may have been put into the graves of Christians,