[4][5] She learned to play piano and organ as a girl and studied music at Alma College, Ontario.

[9] She died in her sleep at her home, Harbel Manor, after a long illness on July 7, 1954, at age 79 in Akron, Ohio.

"In My Garden", to lyrics by Lester O'Keefe (1896–1977), was the opening and ending theme for the program in January 1938 until 1941 when licensing restrictions caused a temporary ban of its use for broadcasting due to it being ASCAP-licensed.

Marshall was a singing coach, concert pianist and accompanist who taught English diction at Juilliard for over half a century.

After her death, her sons made a sizeable donation to the church for the building of the Idabelle Firestone Memorial Chapel.