Lower Canada Rebellion
When news of the arrest of the Patriote leaders reached Upper Canada, William Lyon Mackenzie launched an armed rebellion in December 1837. In the meantime, filibusters from the United States, the Hunter Patriots, formed a small militia and attacked Windsor, Upper Canada, to support the Canadian Patriots. This resulted in the declaration of martial law by the Lower Canadian government.
John Elmsley
John Elmsley (1762 – April 29, 1805) was Chief Justice of Upper Canada and afterwards Lower Canada. In both the Canadas he served as President of the Executive Council and Speaker of the Legislative Council. During the Hunter administration, he was the most powerful man in Upper Canada. In Lower Canada, from 1802 until his death he was second only in rank to the Lieutenant Governor.