This play is founded upon the following story, recorded by Lady Wilde in _Ancient Legends of Ireland_, 1887, vol. i., pp. 60-67:— THE PRIEST’S SOUL. IN former days there were great schools in Ireland where every sort of learning was taught to the people, and even the poorest had more knowledge at that time than many a gentleman has now. But as to the priests, their learning was above all, so that the fame of Ireland went over the whole world, and many kings from foreign lands used to send their sons all the way to Ireland to be brought up in the Irish schools. Now, at this time there was a little boy learning at one of them who was a wonder to every one for his cleverness. His parents were only labouring people, and of course very poor; but young as he was, and poor as he was, no king’s or lord’s son could come up to him in learning. Even the masters were put to shame; for when they were trying to teach him he would tell them something they had never heard of before, and show them their ignorance. One of his great triumphs was in argument, and he would go on till he proved to you that black was white, and then when you gave in, for no one could beat him in talk, he would turn round and show you that white was black, or may be that there was no colour at all in the world. When he grew up his poor father and mother were so proud of him that they resolved to make him a priest, which they did at last, though they nearly starved themselves to get the money. Well, such another learned man was not in Ireland, and he was as great in argument as ever, so that no one could stand before him. Even the Bishops tried to talk to him, but he showed them at once they knew nothing at all.