The Greek editions had been preceded by a Latin version at Rome, by Raphael Volaterranus in 1515, of which the autograph manuscript is in the British Museum, and by another at Paris in 1525, and by a third Latin edition issued at Cologne in 1531.  These were followed by other editions printed at Paris, Antwerp, and Cologne.  In 1618 Fronton du Duc, commonly known as Ducæus, published, in conjunction with Frederic Morel, an edition in two folio volumes containing a Latin version as well as the Greek.  The edition of the French Dominican Father Francis Combefis, was published shortly after his death in 1679.  The most important step in the direction of accuracy and completeness was taken by Julian Garnier, a Benedictine Father of the Congregation of St. Maur.  He revised and corrected the Greek text of earlier editions on the authority of a number of manuscripts in Paris, Italy, and England, and issued the first of his three folio volumes at Paris, at the press of John Baptist Coignard, in 1721.  The third volume did not appear till 1730, five years after Garnier’s death.  In the meanwhile the editorial work had been taken up by Prudent Maran, another Benedictine, to whom are due a careful and voluminous biographical notice, many notes, and a chronological arrangement of the Letters.  This was reissued in three 4° volumes in Paris in 1889, and is the basis of the edition published, with additions, by the Abbé Jacques Paul Migne, in the Patrologia Græca, in 1857.