B.W. Castle 
Last updated: 22.06.17
All that can presently (June 2015) be gleaned about by internet searching is that B.W. Castle is the one-off composer of Perpetual Rag (1908) published by Bixby & Castle, Buffalo, New York, USA.
Surfers are welcome to contribute information about this composer.

Further sheet music at DBE: ON HOLD