Hello I have just found this post to-day May 14 2011 & my Great Grandmother Catharine Thompson was Isabella (Thompson) Brewster,s sister They lived in Frontenac Kingston Ontario. Their parents where John Thompson & Jane Donaldson you probably have this information by now but I thought I would send it to you anyway I have been researching my Grandmothers family for a few years now . & have found some of her siblings families.Catharine Thompson married Thomas Graham & they where my grandmother,s parents bye for now Jackie