In the midst of these dreams there appears with a surprising fidelity to truth the feeling for the picturesque in Polar voyages,- -the transparency of the sea, the aspect of bergs and islands of ice melting in the sun, the volcanic phenomena of Iceland, the sporting of whales, the characteristic appearance of the Norwegian fiords, the sudden fogs, the sea calm as milk, the green isles crowned with grass which grows down to the very verge of the waves. This fantastical nature created expressly for another humanity, this strange topography at once glowing with fiction and speaking of truth, make the poem of St. Brandan one of the most extraordinary creations of the human mind, and perhaps the completest expression of the Celtic ideal. All is lovely, pure, and innocent; never has a gaze so benevolent and so gentle been cast upon the earth; there is not a single cruel idea, not a trace of frailty or repentance. It is the world seen through the crystal of a stainless conscience, one might almost say a human nature, as Pelagius wished it, that has never sinned. The very animals participate in this universal mildness. Evil appears under the form of monsters wandering on the deep, or of Cyclops confined in volcanic islands; but God causes them to destroy one another, and does not permit them to do hurt to the good. We have just seen how, around the legend of a monk the Irish imagination grouped a whole cycle of physical and maritime myths. The Purgatory of St. Patrick became the framework of another series of fables, embodying the Celtic ideas concerning the other life and its different conditions. [Footnote: See Thomas Wright's excellent dissertation, Saint Patrick's Purgatory (London, 1844), and Calderon's The Well of Saint Patrick.] Perhaps the profoundest instinct of the Celtic peoples is their desire to penetrate the unknown. With the sea before them, they wish to know what lies beyond; they dream of a Promised Land. In the face of the unknown that lies beyond the tomb, they dream of that great journey which the pen of Dante has celebrated. The legend tells how, while St. Patrick was preaching about Paradise and Hell to the Irish, they confessed that they would feel more assured of the reality of these places, if he would allow one of them to descend there, and then come back with information St. Patrick consented. A pit was dug, by which an Irishman set out upon the subterranean journey. Others wished to attempt the journey after him. With the consent of the abbot of the neighbouring monastery, they descended into the shaft, they passed through the torments of Hell and Purgatory, and then each told of what he had seen. Some did not emerge again; those who did laughed no more, and were henceforth unable to join in any gaiety. Knight Owen made a descent in 1153, and gave a narrative of his travels which had a prodigious success.