He was succeeded by his long - term Director - General for Finances and ally , Mathias Mongenast .
Eyschen died , whilst still in office , on 11 October 1915 , one year into the German occupation during the First World War .
Eyschen was succeeded by Eyschen 's long - term Director - General for Finances and ally , Mathias Mongenast .
Eyschen died , whilst still in office , on 11 October 1915 , one year into the German occupation during the First World War .