Robert,
You are so kind to do so much for us! I have not been able to locate Mary's death record. I have gone through every Mary McDonald 'death record' that I could find, and there are many, but none that are Roman Catholic and none in a viable area i.e. Kent Co. I have even searched her children. I did find one who died in 1814 in Ridgetown but it had the wrong parents listed. Her maiden name was Lamb, of that much we are certain.
With regard to the newspapers. Are they on line?
With regards, Sharon