SAA, Stadsarchief Amsterdam, NA 419A/14, Nots: J. Jacobsz. Contract (Power of Attorney, Commercial Credit) of Catharina Willekens, David Stafmakers, Abraham Varlet, Pieter ter Weijden, Jasper van Sulpen.
SAA, Stadsarchief Amsterdam, NA 419A/14, Nots: J. Jacobsz. Contract (Power of Attorney, Commercial Credit) of Catharina Willekens, David Stafmakers, Abraham Varlet, Pieter ter Weijden, Jasper van Sulpen.