• Church and State as Seen in the Formation of Christendom
• Journal in France in 1845 and 1848 with Letters from Italy in 1847: Of Things and Persons Concerning the Church and Education
• Peter's Rock in Mohammed's Flood, from St. Gregory the Great to St. Leo III
• St. Peter, His Name and His Office, as Set Forth in Holy Scripture
• The Church of England cleared from the charge of Schism: Upon Testimonies of Councils and Fathers of the first six centuries
• The Formation of Christendom, Volume II
• The Holy See and the Wandering of the Nations, from St. Leo I to St. Gregory I