SAA, Stadsarchief Amsterdam, NA 414/389-389v, Nots N. Jacobsz, Contract (Power of Attorney) of Jacques Boursse, Cornelis Wilmerdonck, Bartholomeus van Ceulen, Jasper Hennickhousen, Jacques Hack
SAA, Stadsarchief Amsterdam, NA 414/389-389v, Nots N. Jacobsz, Contract (Power of Attorney) of Jacques Boursse, Cornelis Wilmerdonck, Bartholomeus van Ceulen, Jasper Hennickhousen, Jacques Hack