"London. British Museum." . . . . . . . . "Musica : B.M. Additional MS. 14905 : the musick of the Britains, as settled by a congress or meeting of masters of music, by order of Gryffydd ap Cynan, Prince of Wales, about A. D. 1100. with some of the most antient pieces of the Britains, supposed to have been handed down to us from the British Druids" . . "Musica. B.M. Additional MS. 14905" . . . . "Ap Huw manuscript" . "Ap Huw manuscript"@en . . . "Musica. B.M. Additional Ms. 14905" . "Musica. B.M. Additional Ms. 14905"@en . . "Musica meu Beroriaeth" . "Musica meu Beroriaeth"@en . "Manuscripts" . "Manuscripts"@en . . "Musica : B.M. Additional MS. 14905" . . . . . . "Facsimiles" . "Facsimiles"@en . .