All that can presently (January 2016) be gleaned about by internet searching is that W. F. Lewinski is the one-off composer of Neutrality Rag (1915).
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by W. F. Lewinski. It does not claim to be complete and represents only the number of items located. Key: Electronic Resource Items