- The German Sectarians of Pennsylvania: 1742-1800
- Benjamin Furly, "an English Merchant at Rotterdam," Who Promoted the First German Emigration to America
- Benjamin Franklin's Account with the Lodge of Masons 1731-1737 as Found Upon the Pages of His Daily Journal
- The religious and social conditions of Philadelphia during the first decade under the federal Constitution, 1790-1800
- The German Pietists of Provincial Pennsylvania: 1694-1708