All that can presently (November 2015) be gleaned about by internet searching is that Calvin Grooms is the one-off composer of Wagneria (1918) published by Century Music Publishing Co., New York, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 5 works by Calvin Grooms. It does not claim to be complete and represents only the number of items located. Key: Items on hold