This fiefdom was bounded by the Ottawa River to the south, a line through the center of the hamlet of Carillon in the west and Clear Lake (Lac Clair) to the north.

In 1697, the Lord of Ailleboust and his wife Catherine Le Gardeur sold their seigneury to their son Pierre d'Ailleboust d'Argenteuil.

In 1796, Jedediah Lane, from Jericho, Vermont, bought from Major Murray several thousand acres of land on both sides of the North River (Rivière du Nord), where Lachute is today.

Five years later, Sir John Johnson, a Loyalist from New York who had resettled in Canada after the American Revolution, bought the rest of the Argenteuil Seigneury.

[4] In 1854, the Parliament of the Province of Canada abolished the seigneurial system, and the County of Argenteuil was created the following year.