See Lewis, Modern Welsh Versions (1929)
{{#if:Aberystwyth National Library of Wales Cardiff MS 2.83 (RMWL MS 6), Aberystwyth National Library of Wales Cardiff MS 3.4 (RMWL Cardiff MS 5), Aberystwyth National Library of Wales Cwrtmawr MS 20A, Aberystwyth National Library of Wales Cwrtmawr MS 314-315D
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