All that can presently (October 2023) be gleaned about Ethel Rosevere
from sheet music covers and by Internet searching is that she was presumably a British actress/singer who has been featured on just 2 works published between 1923 and 1928.
Her portrait on the left is taken from Pyjama Blues
(1923) music by Melville Morris
, words by William K. Wells
and published by Lawrence Wright Music Co.
, , London W.C., England.
Surfers are welcome to contribute any further information about this performer.