Margaret Wemy Wemyss Married My Great Grandfather Peter Williams a Child

Margaret wemy(wemyss)married my great grandfather peter williams.a child mary elizabeth lilian was born at Wooloomooloo nsw on 1 mar 1876 and subsequently married charles bowers on 30 apl 1897.Peter williams was drownd when the Empress of India foundered whilst crossing the bar at Forster on 23 july 1900.Seeking information regarding ancestors of margaret wemyss.