- Scotch Irish Pioneers in Ulster and America
- The private soldier under Washington
- The Athenaeum centenary
- The Founders: Portraits of Persons Born Abroad Who Came to the Colonies in North America Before the Year 1701, With an Introduction, Biographical Outlines and Comments On the Portraits; Volume 1
- Founders: Portraits of Persons Born Abroad Who Came to the Colonies in North America Before the Year 1701 (3 Volumes in 2)