The Three Principal Materials of Knowledge
THE THREE PRINCIPAL MATERIALS OF KNOWLEDGE.
The three principal materials of knowledge of the Bards of the Isle of Britain: wood, that is Coelbren; and Coelvain; which two existed before the faith in Christ was obtained; and when that was obtained, knowledge and understanding was had of the third, namely Plagawd, that is, the dressed skin of a beast, which is called parchment. (Grawen. 1 There are two grawens: one of wood, the other of a beast.)
