All that can presently (May 2013) be gleaned about by internet searching is that William H. Kiefer is the one-off composer of Raggy Trombone (1908).
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by William H. Kiefer.
It does not claim to be complete and represents only the number of items located.