Hi Elaine: I wanted to let you know that your Margaret Erratt is a sister to my Mary Ella Erratt (who married Andrew Barrigar) and they are the daughters of Isaac Erratt and Sarah Jane Devitt. They had 5 other siblings including Isaac Henry, Wesley, John, Martha and Almoron and 3 step siblings: William Edward and Alfred.
Margaret Erratt married Joshua Annable 26 Feb 1858 and had 10 children including: Stephen, Margaret A., Martha, Joshua, Susanna, Mary E, Ira, John W, George, Carry. I have more info to share on this family, etc. if interested. Cheers, Penny