- Philipp Waldeck's Diary of the American Revolution
- Philipp Waldeck's Diary of the American Revolution; Printed from the Original Manuscript with Introd. and Photographic Reproduction of the List of Officers
- The Pennsylvania German Dialect
- The Life of Francis Daniel Pastorius, the Founder of Germantown, Illustrated With Ninety Photographic Reproductions
- The American Ethnographical Survey; Conestoga Expedition, 1902