Now it chanced, when they had reached the further edge of this region, that as they went one night belated along a green riding, which in the old time had been a spacious paved causeway between rich cities, they heard the music of a harp, more marvellously sweet and solacing than any mortal minstrel may make; and sweet dream-voices sighed to them "Follow, follow!" and they felt their feet drawn as by enchantment; and as they yielded to the magical power, a soft shining filled the dusky air, and they saw that the ground was covered with soft deep grass and brilliant flowers, and the trees were of the colour of gold and silver. So in strange gladness, and feeling neither hunger nor fatigue, they went forward through the hours of the night till the dawn, wondering what angelic ministry was thus beguiling them of hardship and pain. But with the first gleam of the dawn the music ceased amid mocking laughter, the vision of lovely woodland vanished away, and in the grey light they found themselves on the quaking green edges of a deep and dangerous marsh.  Hilary, when he saw this, groaned in spirit and said: "O dear sons, we have deserved this befooling and misguidance, for have we not forgotten the behest of our Master, 'Watch and pray lest ye enter into temptation'?"