Henry W. Davis 
Last updated: 22.06.17
All that can presently (May 2013) be gleaned about by internet searching is that Henry W. Davis is the one-off composer of David Harum (1900) published by M. Witmark and Sons, New York, Chicago, San Francisco, USA.
Surfers are welcome to contribute information about this composer.

Further sheet music at DBE: ON HOLD