Source: Civil War–era loyalty oaths, 1861-1871, Dexter P. Tiffany Collection Location: Dexter P. Tiffany Collection, Archives
Last Name:	Helmkamp
First Name:	Henry
Middle Name:	W.
Collection:	Dexter P. Tiffany Collection
Box:	69
Folder:	10
Date of Document:	11/2/1868