
All that can presently (November 2023) be gleaned about
Grace & Frank Graham from sheet music covers and by Internet searching is that they were presumably American vaudeville performers who have been featured on 3 works published between 1899 and 1901.
Their portrait on the left is taken from
Among the Hills of Maryland (1899) music by
Robert Morrison Stults, and published by
M.D. Swisher, Philadelphia, Pennsylvania, USA.
Surfers are welcome to contribute any further information about these performers.