The Christian priest felt the temptation sufficiently to be always grateful for the grace that had carried him through it. At the end of a year, the old doctor died, and his nephew sold Vincent again. His next master was a native of Nice, who had not held out against the temptation to renounce his faith in order to avoid a life of slavery, but had become a renegade, and had the charge of one of the farms of the Dey of Tunis. The farm was on a hillside in an extremely hot and exposed region, and Vincent suffered much from being there set to field labour, but he endured all without a murmur. His master had three wives, and one of them, who was of Turkish birth, used often to come out and talk to him, asking him many questions about his religion. Sometimes she asked him to sing, and he would then chant the psalm of the captive Jews: 'By the waters of Babylon we sat down and wept;' and others of the 'songs' of his Zion. The woman at last told her husband that he must have been wrong in forsaking a religion of which her slave had told her such wonderful things. Her words had such an effect on the renegade that he sought the slave, and in conversation with him soon came to a full sense of his own miserable position as an apostate. A change of religion on the part of a Mahometan is, however, always visited with death, both to the convert and his instructor. An Algerine, who was discovered to have become a Christian, was about this time said to have been walled up at once in the fortifications he had been building; and the story has been confirmed by the recent discovery, by the French engineers, of the remains of a man within a huge block of clay, that had taken a perfect cast of his Moorish features, and of the surface of his garments, and even had his black hair adhering to it. Vincent's master, terrified at such perils, resolved to make his escape in secret with his slave. It is disappointing to hear nothing of the wife; and not to know whether she would not or could not accompany them. All we know is, that master and slave trusted themselves alone to a small bark, and, safely crossing the Mediterranean, landed at Aigues Mortes, on the 28th of June, 1607; and that the renegade at once abjured his false faith, and soon after entered a brotherhood at Rome, whose office it was to wait on the sick in hospitals. This part of Vincent de Paul's life has been told at length because it shows from what the Knights of St. John strove to protect the inhabitants of the coasts. We next find Vincent visiting at a hospital at Paris, where he gave such exceeding comfort to the patients that all with one voice declared him a messenger from heaven.