My great great grandmother was Sarah Ann (either Ruston or Preston)born in 1840 Charlotte,Vermont.The marriage license of my great great grandparents states that Sarah Ann's maiden name was Zubar(could possibly have been pronounced Rubar).Sarah Ann Ploof died on October 28,1887 in Ferrisburgh,Vermont.She was the wife of Abraham Ploof(Ploff,Plouffe).Her death records states she was an adopted child.Parents can't be found.When she was adopted, I haven't a clue.Can you please help?

Thanks for the reply.