All that can presently (March 2021) be gleaned about
Leah Adelle from sheet music covers and by internet searching is that she has been featured on just one work namely
Be an Outlaw's Bride (1909) music:
Paul Pelham, words: ruleh, and published by
Francis, Day & Hunter, London W.C.2, England.
Surfers are welcome to contribute information about this performer.