First he ordered Laurent to buy him an image of the Virgin Mary, holy water, and a crucifix. Next he wrote two letters, addressed to friends in Venice--letters in which he made no complaint, but spoke of the benevolence of the Inquisition, and the blessing that his trials had been to him. These letters, which, even if they reached the hands of the secretary, could do him no possible harm, he entrusted to Soradici, in case he should soon be set free; exacting the spy's solemn oath, on the crucifix and the image of the Virgin, not to betray him, but to give the letters to his friends. Soradici took the oath required of him, and sewed the letters into his vest. None the less, Casanova felt confident that he would be betrayed, and this was exactly what happened. Two days after the spy was sent for to the secretary, and when he returned to the cell, his companion soon discovered that he had given up the letters. Casanova affected the utmost anguish and despair. He flung himself down before the image of the Virgin, and demanded vengeance on the monster who had ruined him by breaking so solemn a pledge. Then he lay down with his face to the wall, and for the whole day uttered no single word to the spy, who, terrified at his companion's prayer for vengeance, entreated his forgiveness. But when the spy slept he wrote to Father Balbi and told him to go on with his work the next day, beginning at exactly three o'clock, and working four hours. The next day, after the gaoler had left them, bearing with him the book of Father Balbi in which the prisoner's letter was concealed, Casanova called his companion. The spy, by this time, was really ill with terror; for he believed that he had provoked the wrath of the Virgin Mary by breaking his oath. He was ready to do anything his companion told him to do, and weak enough to credit any falsehood. Casanova put on a look of inspiration, and said: