Complex sentence: As Jerome completed his translations of each book of the Bible, he recorded his observations and comments in an extensive correspondence with other scholars; and these letters were very soon collected and appended as prologues to the Vulgate text for those books where they survived.
Split into simpler sentences: As Jerome completed his translations of each book of the Bible, he recorded his observations and comments in an extensive correspondence with other scholars. These letters were collected and appended as prologues to the Vulgate text for those books where they survived.