
Wm. H. Egle, M.D., ed. Pennsylvania Archives, Second Series, Vol. XVII (Harrisburg, PA: E. K. Meyers, State Printer, 1890), p. 443. Image courtesy of Google Books.
The same book does list a Johan Georg Gebhardt who arrived on the Chance 8 Aug 1764. Whether this is the right Johan Georg is not known at this time.

Wm. H. Egle, M.D., ed. Pennsylvania Archives, Second Series, Vol. XVII (Harrisburg, PA: E. K. Meyers, State Printer, 1890), pp. 458-459. Image courtesy of Google Books.
