I found 2 Mary Burke's that died on July 9, 1914 in Luzerne County, Pennsylvania and 1 that died January 3, 1913 in Pittston, Pennsylvania Could one of them be Mary Ford who married Thomas Burke who was an R. R. Man Switchman for the Rail road in Pittston, Pennsylvania. Thomas Burke was a widow when he lost his wife Mary Mame Nauin Ford in 1915 or before 1915.
