[S372] Schaefer Reunion Information, Hierholzer, E. J., (Group Sheet: Floresville, Texas), pp. 1-2, not dated.
[S389] Letter from E.J. Hierholzer to Wendel Voigt, Hierholzer, E.J., (Letter: Floresville, Texas), [Straach ], 14 May 1986.
[S6] NEW BRAUNFELS: THE FIRST FOUNDERS, VOL II, Fey, Everett Anthony, (Eakin Press, Austin, Texas, 1994, ISBN 0-89015-987-4, Vol. II The Genealogies), pp. 175, 180.
[S450] Family Information from Ann Little, Little, Ann, (Group Sheets: Fredericksburg, Texas), [Schaefer p. 476], 12 Oct 2002.
[S6] NEW BRAUNFELS: THE FIRST FOUNDERS, VOL II, Fey, Everett Anthony, (Eakin Press, Austin, Texas, 1994, ISBN 0-89015-987-4, Vol. II The Genealogies), pp. 175, 180, not dated.
[S389] Letter from E.J. Hierholzer to Wendel Voigt, Hierholzer, E.J., (Letter: Floresville, Texas), [Straach pp. 1-2], 14 May 1986.
[S6] NEW BRAUNFELS: THE FIRST FOUNDERS, VOL II, Fey, Everett Anthony, (Eakin Press, Austin, Texas, 1994, ISBN 0-89015-987-4, Vol. II The Genealogies), pp. 175, 180, 14 May 1986.