The Frank R. Diffenderffer Collection contains documents collected by Mr. Diffenderffer. These documents are primarily from the eighteenth and nineteenth centuries and include letters, legal and court papers, indentures, receipts, property and probate records, and financial and military papers. The people and businesses represented include George Ross, Jasper Yeates, A. Herr Smith, Timothy Matlack, Mount Hope Furnace, and the Lancaster, Elizabethtown & Middletown Turnpike Road Company.
Typical lock found on the doors of eighteenth-century houses in the Pennsylvania Countryside. The Rohrer family were lock makers in Lebanon, Pennsylvania. This one made by John Rohrer, Lebanon, 1803. Another one can be found on page 249, "American Copper and Brass" by Henry J. Kauffman