Reginald A. A. Stoneham 
Last updated: 20.02.17
All that can presently (March 2015) be gleaned about by internet searching is that Reginald A. A. Stoneham is the one-off composer of The Tango Rag (1914) published by Chapman's Music & Musical Instrument Stores, , Australai.
Surfers are welcome to contribute information about this composer.