All that can presently (October 2015) be gleaned about by internet searching is that Charles Roy Cox is the one-off composer of Centennial Rag (1912) published by Buckeye Music Pub. Co., Columbus, Ohio, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by Charles Roy Cox.
It does not claim to be complete and represents only the number of items located.