All that can presently (March 2021) be gleaned about Harry Lynn
from sheet music covers and by internet searching is that he has been featured on just one work published in 1907:
Oh, That Good-Night at the Door!
(1907) words & by music Charles Ridgewell
published by Francis, Day & Hunter
, London W.C.2, England.
Surfers are welcome to contribute any further information about this performer.