All that can presently (July 2019) be gleaned about Eddie Cox from sheet music covers and by internet searching is that he has 2 works published between 1915 and 1916.
Of ragtime interest is Take Me to the Midnight Cake Walk Ball (1915) published by Maurice Abrahams Music Co..
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 2 works by Eddie Cox.
It does not claim to be complete and represents only the number of items located. Keys:ER(w&m)
Take Me to the Midnight Cake Walk Ball(w&m)
Authur Jackson (co-author) Maurice Abrahams (co-author) Daphne Pollard (perf.)