I am at a dead-end in my genealogical research. I am looking for more information on a Charles Colquhoun who had a sister Margaret Colquhoun who came to Prince Edward County in the early 1800's (around 1818 or so) from New Brunswick. Charles married Sarah Ann Cannon. The only thing we know about them is their (Charles and Margaret's) mothers name is Isabel or Isabella Mathewson. There is absolutely no records I could find on the Charles or Isabella or Charles' father which is what I am very interested in as this would provide the link to the rest of their history I believe. The other peice of info I know is that Charles father came to Canada in 1804 and had married Isabella Mathewson and they lived on a farm in New Brunswick. I am almost certain that Charles' fathers last name was spelled Colquhoun at that time, but I have also searched variations and have found no link between Isabella Mathewson and any Colquhouns, Cahoons, Calhouns, etc.