-Cambridge: University Library (Adv. D, 3.22 or Ms. Oo. IV.35): Adolf Occo, Imperatorum Romanorum numismata, Antwerp, Plantin, 1579 – book annotated by Jacob Cools (Colius Ortelianus, 1563-1628), the nephew of Ortelius, giving numbers for his coin collection (1,129 in 1603) as well as for the one of Abraham Ortelius (1,925 coins in 1597).