- Johannic Baptism
- Classic Baptism: An Inquiry Into the Meaning of the Word Baptizo as Determined by the Usage of Classical Greek Writers
- Judaic Baptism
- Bedyddio: Ymchwiliad I Feddwl Y Gair Baptizo (1877)
- An Inquiry into the Usage of Baptizo, and the nature of Christic and Patristic Baptism, as exhibited in the Holy Scriptures and Patristic Writings.