Display Title: Myfi 'r pechadur pena' (Yes, I the greatest sinner)First Line: Myfi 'r pechadur pena' (Yes, I the greatest sinner)Tune Title: COLUMBUSAuthor: Parch. Samuel Roberts; Rev. Edward RobertsMeter: M. 7.3.Date: 1918Source: Y Drysorfa Ysbrydol (stanza 2)