All that can presently (September 2019) be gleaned from sheet music covers and by internet searching is that Ed Gardenier is the one-off composer of There's a Lot of Things You Never Learn at School (1902) coauthored with Edwin S. Brill and published by Doty & Brill, New York, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 2 works by Ed Gardenier.
It does not claim to be complete and represents only the number of items located. Keys:(w&m)
There's a Lot of Things You Never Learn at School (w&m)