The town and province of Quesnoy were also given in dowry to Margaret of York, the third wife of Charles the Bold of Burgundy upon marriage in Damme, Flanders, 1468. She was also the sister of Kings Edward IV and Richard III of England. A conscientious noblewoman and aware of her duchess status as a political contract (cementing the politico-economic links of Burgundy-Netherlands-England), she was an informed advisor to her husband, and after his death, to Mary of Burgundy and Maximilian of Austria, the new sovereigns of the Netherlands and Hainaut. At that time, several men of fiefs and legal representatives of the Duke and Duchess of Burgundy officiated at Le Quesnoy in the administration of Hainaut, such as Jehan de Longchamp, Jacquemart du Parc, Jacquemart de Surie, Enguerrand le Jeune. This feudal organization was superimposed on the manorial organization that was the foundation, which called these men of fiefs to preside over the complexity and tangle of fiefs and under-fiefs and their rights and changes over time: the seals of those "notaires" appended to the deeds they passed conferred full authority and exempted the use of the seal of the Bailiwick (of the municipal administration, today).