Long, long ago, there was a good saint named David, who taught the early Cymric or Welsh people better manners and many good things to eat and ways of enjoying themselves. Now the Welsh folks in speaking of their good teacher pronounced his name Tafid and affectionately Taffy, and this came to be the usual name for a person born in Wales. In our nurseries we all learned that "Taffy was a Welshman," but it was their enemies who made a bad rhyme about...