John Osborne and James W. Gerencser, eds., “David Benjamin Herman,” Dickinson Chronicles, http://chronicles.dickinson.edu/encyclo/h/ed_hermanDB.htm.
Herman quickly engaged himself in the cattle trade in Iowa and expanded his operations into Nebraska with the opening of the territory during those years. The natives of the Plains did not submit without a fight, and in the climactic year of the wars that followed, 1876, David Herman was killed by hostile Lakota Sioux on the North Platte River on May 20, just a month before Crook's defeat at the Rosebud and Custer's disaster at the Little Big Horn. Family information indicated that he was intending to end his business and return to Carlisle. He was killed on December 29, 1876. He was thirty-one years old.