Ethnicity
- African Americans in Pennsylvania
- The Scotch-Irish in Pennsylvania
- German Lutherans in Pennsylvania
- German Mennonites in Pennsylvania
- Native Americans in Pennsylvania
- Native Americans in Derry Township
- The Pennsylvania German Dialect
- Milton S. Hershey’s Colonial Roots
Religion
- Religious Institutions in Modern Derry Township
- William Penn and the Colony of Pennsylvania
- A Brief History of Sand Hill- St. Paul Lutheran Church
- A Brief History of Derry Presbyterian Church
- A Brief History of the Spring Creek Meetinghouse and Cemeter
Education and Economics
- Blacksmiths in Early Derry Township
- Education in Colonial Derry Township
- A Brief History of the Derry Township School District
- A Brief History of the Milton Hershey School
- A Brief History of the Hershey Chocolate Company
- A Brief History of Indian Echo Caverns
Political Geography
- A Brief History of Derry Township
- .. Dauphin County
- .. Hummelstown
- .. Lancaster County
- .. Conewago Township
- .. Londonderry Township
- .. Lower Paxton and Swatara Townships
- .. South Hanover Township
Modern Institutions
- A Brief History of the Hershey/Derry Township Historical Society
- The Hershey Community Archives
- The Hershey Story Museum
Miscellaneous