All that can presently (August 2019) be gleaned about Harry E. Ellman from sheet music covers and by internet searching is that he has 5 works published in 1910.
Of ragtime interest are Captivatin' Rag
(1910) published by The Wellworth Music Pub. Co.
, St. Louis, Missouri, USA.and Sand Paper Rag
(1910) published by Stark Music Co
, St. Louis, Missouri, USA
Surfers are welcome to contribute information about this composer.