Mary Stafford/Mitchell-NY City

I have just started researching my Stafford family, this is what I have so far:
Mary Stafford (no dates)married a man with the surname Mitchell I beleive in NY City.
Having Edward Stafford Mitchell b.1890??(may be more children but unsure yet)
Edward married Margaret J. Vaughan having:
Edward Stafford Jr., Norbert, Myra and Walter Anthony, my grandfather,
All children were born in Manhattan, NY
Walter married Beatrice Driscoll, having
Edward, Walter, Vaughan, Margaret, Florence, and Johnny..Margaret is my mother.
Any help on this family would greatly be appreciated
Tara Corter