The Most Ancient Lives of Saint Patrick/The Life and Acts of St. Patrick/Chapter 51
How Saint Lumanus Sailed against the Wind and the Stream.
And Saint Patrick, having sailed over from Ulidia, came unto the territory of Midia, at the mouth of the river Boinn, among barbarians and idolaters; and he committed his vessel and its tackle unto his nephew, Saint Lumanus, enjoining him that he should abide there at the least forty days, the while he himself would go forward to preach in the interior parts of the country. But Lumanus, abiding there the messenger of light, and being made obedient through the hope of obtaining martyrdom, doubled the space of time that was enjoined unto him, which no one of his companions, even through the fear of their lives, dared to do. Yet was not this child of obedience disappointed of his reward. For while he received the seed of obedience, he brought forth unto himself the fruit of patience, and deserved to fertilize strange lands, even with the seed of the divine Word, to the flourishing of the flowers of faith and the fruits of justice; and the more devotedly he obeyed his spiritual father, the more marvellously did the elements obey him. And having fulfilled there twice forty days, and being wearied with the continual expectation of the saint's return, on a certain day, the wind blowing strongly against him, he hoisted the sails, and, trusting in the merits of Saint Patrick, even by the guidance of the vessel alone passed he over unto the place where he was appointed to meet him. O miracle till then unheard and unknown! The ship, without any pilot, sailed against the wind and against the stream, at the bidding of the man of God, and bore him with a prosperous course from the mouth of the Boinn even to Athtrym; and He who formerly turned back the stream of Jordan unto its fountain did, for the merits of Patrick, guide the vessel against the wind and against the stream.