Geiriadur Cymraeg a Saesonaeg, ynghyd a grammadeg o iaith y Cymry : A dictionary of the Welsh language...to which is prefixed a grammar of the Welsh language

Geiriadur Cymraeg a Saesonaeg, ynghyd a grammadeg o iaith y Cymry : A dictionary of the Welsh language...to which is prefixed a grammar of the Welsh language