Born: January 31, 1877, Elbert County, Georgia.
Died: June 4, 1960, Butts County, Georgia.
Buried: Oconee Hill Cemetery, Athens, Georgia.
Eulalie was the daughter of Singleton Martin Mewbourne and Lucinda Margret Thomason, and wife of composer John B. Vaughan.
Some sources give her name as Eulalia Mewbourn.
Her tombstone says Eulalie Mewbourne.
If you know where to get a good photo of Vaughan (head & shoulders, at least 200×300 pixels),