All that can presently (May 2013) be gleaned about by internet searching is that J.M. Scales is the one-off composer of Coon Time Rag (1903) published by Thos. Goggan & Bros., Galveston, Texas, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by J.M. Scales.
It does not claim to be complete and represents only the number of items located.