His great work was the Vulgate, but his achievements in other fields would have sufficed to distinguish him.
For the text of scripture he uses both the Latin versions, the Itala and the Vulgate, often comparing them together.
In 1546 the council of Trent adopted the canon of Augustine, declaring " He is also to be anathema who does not receive these entire books, with all their parts, as they have been accustomed to be read in the Catholic Church, and are found in the ancient editions of the Latin Vulgate, as sacred and canonical."
Thus the Apocrypha Proper constitutes the surplusage of the Vulgate or Bible of the Roman Church over the Hebrew Old Testament.
But this is only true with certain reservations; for the Latin Vulgate was revised by Jerome according to the Hebrew, and, where Hebrew originals were wanting, according to the Septuagint.