The Musical Composers of Lancaster County Collection contains sheet music written by local composers. Some local titles are "Lancaster German Waltz" and "Lancaster Theme & Gratitude Theme." Included in the collection is information about S. Becker von Grabill, composer and pianoforte teacher, and James L. Knipe of Aston, Knipe & McCarthy.
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.
This collection contains published and manuscript speeches, lectures, addresses, orations, etc., written and given by people of Lancaster County on various topics and subjects.