Pennsylvania's Soldiers' Orphan Schools, Brief sketches and engravings of the several institutions, with names of pupils subjoined. Page 357, 1877.
List of students,including Clarence Keiffer and Valentine Keiffer, their birthdates, date of admission and discharge, post office address when at home, and remarks (trade or occupation).
Stephen Keiffer, in U.S. Civil War Soldiers, 1861-1865 2007.
National Park Service. U.S. Civil War Soldiers, 1861-1865 database on-line. Ancestry.com.
Union soldiers from Pennsylvania enlisting on July 4 1861., in American Civil War Soldiers Ancestry database on-line, 1999.
Compilation of military records (including state rosters, pension records, and regimental histories of individual soldiers who served in the United States Civil War.
Information on birth, death dates and burial place , in Pennsylvania, Find A Grave Index, 1681-2011.
Stephen Kieffer's birth and death dates, age at death and burial place: Camp Hill Cumberland, Pennsylvania, USA.
Stephen Keiffer first enlisted as a private on 4 July 1861. He was a Private in I Company, 28th Regiment, Pennsylvania Infantry. He mustered out on 18 July 1865 at Washington, D.C.