All that can presently (May 2013) be gleaned about by internet searching is that W. C. Coleman is the one-off composer of Rag-Knots (1899).
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 4 works by W. C. Coleman.
It does not claim to be complete and represents only the number of items located. Keys:ER