Complex sentence: His postills on the Book of Jeremiah, the Book of Lamentations, the Book of Baruch and the Twelve Minor Prophets survive in five medieval manuscripts, and two commentaries, one on the Catholic Epistles and the other on the Book of Revelation, are presumed lost.
Split into simpler sentences: His postills on the Book of Jeremiah, the Book of Lamentations, the Book of Baruch and the Twelve Minor Prophets survive in five medieval manuscripts. Two commentaries, one on the Catholic Epistles and the other on the Book of Revelation, are presumed lost.