May 7, 1886
Charles Potter, U.S. Indian Agent for the Omaha and Winnebago Agency, requests on behalf of Sin-de-ha-ha or William Hamilton that his son Joseph Hamilton be returned from the Carlisle Indian School. Potter cites Sin-de-ha-ha's poor health as a reason for requesting the return of his son.
National Archives and Records Administration
RG 75, Entry 91, box 314, 1886-#15341