She was living in Wellsboro, Pennsylvania in 1910.
The 1899 Tioga County PA Directory for Wellsboro shows Barnum Grace B., dressmaker, bds Fellows Ave. and Barnum Julia, widow Abram; home, Fellows Ave.
From the Wellsboro Agitator, Wellsboro, PA, Wednesday, March 16, 1938: Mrs. Grace Campbell, of 19 Austin St, Wellsboro, died Saturday (March 12) morning after a long illness at the family home. She is survived by her husband, John L. Campbell, a daughter Juliet and a son Leonard of Wellsboro, two sisters, Mrs. Ralph Newell of Horseheads; Mrs. Frank Chapin of Halstead; three brothers, Isaac Barnum of Berwick, J.A. Barnum of Sedalia, Mo., Dr. K. R. Barnum of Kansas City, Mo. Burial in the Wellsboro Cemetery.