Find a Grave, 2017, John Rees (record added Jan 27, 2013)
Marriage Record of the German Reformed Church at Philadelphia
Laurel Hill Cemetery
Centre County genealogy
Black Oak Cemetery (Port Matilda, Pa.) archives
— Reference headstone readings and Black Oak Church cemetery roster listing, as of September 1, 2001.
Johannes Schwalm Historical Association, Inc.
The American Revolution.Org
The American Revolution.Org - The Battle of Trenton
The American Revolution.Org - The Battle of Germantown
The American Revolution.Org - The Hessians
Infanterie Regiment von Donop
"The life and times of typical Hessian soldiers"