I believe you are refering to a rebellion led by Willian Lyon Mackenzie in the East of Ontario. The book "Life and Times of William Lyon Mackenzie", by Charles Lindsey, 2 Vols.?, P.R. Randall, Toronto, 1862, maybe will help you.
Another Rebellion occured in 1837 featured "The Duncombe Rebels" and there are several researchers who have written about the Rebellion of 1837 in the Western part of Canada: Colin Read did his Doctoral thesis on the subject which was suppposed to be published by the University of Toronto Press; "The Rising in Western Upper Canada, 1837-38: The Duncombe Revolt and After", 1974. Ron Stagg, associate of above, producing a book of documents for the Champlain Society on the rebellion.
An interesting excerpt: Fifty-two of the 196 subjects were born in Upper Canada, 50 in the United States, and 33 in Great Britain. (The origens of the other 61 remain a mystery.)The subjects were ones used in his study of the statistics of the Rebels, but there were some 500 men who mustered south of Brantford hoping to overthrow the Govt. of Upper Can.