Extract from Montias Database (Frick Collection):

"On 1 November 1610, Hans Thysz., merchant in Amsterdam, and Nicolaes Coop (the cythermaker and innkeeper), acting in the name and on behalf of Pieter Paul Rubens signed a contract whereby Hans Tijsz. sold to Rubens a house and bleaching works that he owned in Antwerp (for 8,960 f.) The transfer of the house and bleaching works were to take place in Antwerp, in the presence of Doctor Andries Bacher, counsellor and physician of His Highness the Prince of Brunswyck, and by Hans Thijsz. or his representatives The contract also specified that Rubens would have to paint a painting for Thijsz. and instruct (leeren en onderwysen) a son of his (unnamed), in the art of painting."