Gentry Shelton 
Last updated: 22.06.17
All that can presently (January 2016) be gleaned about by internet searching is that Gentry Shelton is the one-off composer of The Horse Show Ragtime March (1899) published by Val. A. Reis Music Co., St. Louis, Missouri, USA.
Surfers are welcome to contribute information about this composer.

Further sheet music at DBE: ON HOLD