JanetJohnstone,Glasgow,m.Webster,NScotia

Looking for any information about dates, forebears and family of Janet Johnstone, born about 1810, from Glasgow. Family may have been ship chandlers in Glasgow. She married James Webster ( I have no dates, except that one of their daughters. my g-grandmother, was born in 1833.)and they moved to NOVA SCOTIA. They had two children I know of, Mary and Marion. Mary married someone named Buhoe. Marion married William MacDonald. I am dsescended from them, and have a lot of info on their descendants. This is all I have, and would like a lot more. Anyone make a connection or have any more information? Thanks.