Ackermann, H 18??-19?? Germany, ? - ?, ?
remarkable is that he did not publish any music in Germany, and his sole known publication is the one listed here
Title
Parts
[] Frohliche Jugend. Zwolf sehr leichte melodiose klavierstucke im violin-schlussel mit fingersatz & vortragszeichen fur den unterricht
versehen
pub Schott & Co., London 1906
ms British Library, London