- Dictionary Of The Welsh Language: Explained In English
- A Dictionary of the Welsh Language. [Preceded By] a Grammar of the Welsh Language. 2 Vols. [In 3 Pt.]. [Followed By] an Outline of the Characteristics of the Welsh. 2 Vols. [In 4 Pt.]
- The Myvyrian Archaiology of Wales: Collected Out of Ancient Manuscripts; Volume 2
- Geriadur Cymraeg A Saesoneg: An Abridgement Of The Welsh And English Dictionary
- A Dictionary of the Welsh Language