Robert D'Unger was my great grandfather. He was born in Hagerstown, MD and lived in Cambridge, Dorchester County, MD, Baltimore Maryland, Duluth, Minn., and Chicago where he died. He was the resident doctor for the Palmer House Hotel in Chicago. He had several children, my grandfather being Claude. Claude had two children, Robert d'Unger who spent most of his life in Boston and my mother, Josephine D'Unger Warfield who had ten children, seven still living. I would be glad to give you more information if you would like it. I have the names of his children and most of the names of his siblings. His father operated a mill near Hagerstown.