All that can presently (September 2019) be gleaned from sheet music covers and by internet searching is that Jas. F. Thomas is the one-off composer of Formanian (1907) published by The Tolbert R. Ingram Music Co., Denver, Colorado, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by Jas. F. Thomas.
It does not claim to be complete and represents only the number of items located. Keys:ER