headmaster of the Amsterdam Grammar School (1599-1678)
Portret van Cornelius Sladus, RP-P-1910-6870.jpg
Nieuw Nederlandsch Biografisch Woordenboek
Album amicorum of Jacobus Heyblocq (1623-1690), rector of the Latin school in Amsterdam
WikiProject Alba amicorum of the KB, national library of the Netherlands