During our author's stay at Paris he finally completed and sent to the press his great work on the _Lives of the Saints_. We have seen that, from his tenderest years, he had discovered his turn for sacred biography. At a very early period of his life he conceived the plan of his work; and from that time pursued it with undeviating attention. He qualified himself for an able execution of it, by unremitted application to every branch of profane or sacred literature connected with it. He was, a perfect master of the Italian, Spanish, and French languages. The last he spoke and wrote with fluency and purity. He was also perfect master of the Latin and Greek languages. At an advanced period of his life he mentioned to the editor that he could then understand the works of St. John Chrysostom as easily in the original as in the Latin interpretation; but that the Greek of Saint Gregory Nazianzen was too difficult for him. A few years before he died he amused himself with an inquiry into the true pronunciation of tee Greek language, and in preparing for the press some sheets of an intended Greek grammar. To attain that degree of knowledge of the Greek language is given to few: Menage mentions that he was acquainted with three persons only who could read a Greek writer without an interpreter. Our author had also some skill in the oriental languages. In biblical reading, in positive divinity, in canon law, in the writings of the fathers, in ecclesiastical antiquities, and in modern controversy, the depth and extent of his erudition are unquestionable. He was also skilled in heraldry: every part of ancient and modern geography was familiar to him. He had advanced tar beyond the common learning of the schools in the different branches of philosophy; and even in botany and medicine he was deeply read. In this manner he had qualified himself to execute the work he undertook. IX. The present section is intended to give _An account of some of the principal works he consulted in the composition of it_. It will contain, 1st, some remarks on the attention of the church, during the early ages of Christianity, to preserve the memory of the martyrs and saints: 2dly, some account of the acts of the martyrs; 3dly, some account of the sacred calendars: 4thly, some account of the Martyrologies: 5thly, some account of the Menaeon and Menologies of the Greek church; 6thly, some account of the early Agiographists: 7thly, some account of the Bollandists: and, 8thly, some account of the process of the beatification and canonization of saints.