- 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.]
- Cambrian Register; Volume 3
- The Myvyrian Archaiology of Wales: Collected Out of Ancient Manuscripts; Volume 2
- A Dictionary Of The Welsh Language, Explained In English: With Numerous Illustrations, From The Literary Remains And From The Living Speech Of The Cymry; Volume 1