Referencia documental:
SAA, Stadsarchief Amsterdam, NA 126/55v, Nots: J. F. Bruijining. Contract (Statement, Loan, Commercial credit) of Gerard Mertens, Jan du Pont, Jan Aventroot, Pruijs, Van Backer, Willem Willemsz, Johannes Henten, Cornelis Snellinck, Hans van Ussele, Daniel Schouck, Jacques Vlacq, Hans Berenberch, Pauwel Berenberch, Jan de Meyer, Cornelis de Meyer