William Ridgley 
Last updated: 20.02.17
All that can presently (May 2013) be gleaned about by internet searching is that William Ridgley is the one-off composer of Black Rag (1925) recorded on the CD given below.
Surfers are welcome to contribute information about this composer.
CDs :
Ragtime Music CDs:
cd15.gif Various Artists on "Rags to Rhythms" flag15us.gif flag15uk.gif flag15de.gif flag15fr.gif flag15ca.gif