All that can presently (June 2019) be gleaned from sheet music covers and by internet searching is that H.L. Berger has 9 works published between 1900 and n.d..
Of ragtime interest is Chippewa (1906) published by Graul Pub. Co., Detroit, Michigan, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 9 works by H.L. Berger.
It does not claim to be complete and represents only the number of items located. Keys:ER