All that can presently (March 2016) be gleaned about by internet searching is that H.S. Brennan is the one-off composer of Huckleberry Finn (1900) published by Joe Morris Music Company, New York, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by H.S. Brennan.
It does not claim to be complete and represents only the number of items located. Keys:ER