What wind there was blew against their course, so Ian rowed unceasingly. In silence they passed once again the headland of Aoidhu; in silence they drifted past a single light gleaming in a croft near Aonaig--a red eye staring out into the shadow of the sea, from the room where the woman Marsail lay dying; and in silence their keels grided on the patch of shingle in Caisteal-Rhona haven. For days thereafter Alan haunted that rocky, cavernous wilderness where he had seen the Herdsman. It was in vain he had sought everywhere for some tidings of this mysterious dweller in those upland solitudes. At times he believed that there was indeed some one upon the island of whom, for inexplicable reasons, none there would speak; but at last he came to the conviction that what he had seen was an apparition, projected by the fantasy of overwrought nerves. Even from the woman Morag MacNeill, to whom he had gone with a frank appeal that won its way to her heart, he learned no more than that an old legend, of which she did not care to speak, was in some way associated with his own coming to Rona. Ian, too, never once alluded to the mysterious incident of the green arcades which had so deeply impressed them both: never after Alan had told him that he had seen a vision. But as the days passed, and as no word came to either of any unknown person who was on the island, and as Alan, for all his patient wandering and furtive quest, both among the upland caves and in the green arcades, found absolutely no traces of him whom he sought, the belief that he had been duped by his imagination deepened almost to conviction. As for Ian, he, unlike Alan, became more and more convinced that what he had seen was indeed no apparition. Whatever lingering doubt he had was dissipated on the eve of the night when old Marsail Macrae died. It was dusk when word came to Caisteal-Rhona that Marsail felt the cold wind on the soles of her feet. Ian went to her at once, and it was in the dark hour which followed that he heard once more, and more fully, the strange story which, like a poisonous weed, had taken root in the minds of the islanders. Already from Marsail he had heard of the Prophet, though, strangely enough, he had never breathed word of this to Alan, not even when, after the startling episode of the apparition in the Teampull-Mara, he had, as he believed, seen the Prophet himself. But there in the darkness of the low, turfed cottage, with no light in the room save the dull red gloom from the heart of the smoored peats, Marsail, in the attenuated, remote voice of those who have already entered into the vale of the shadow, told him this thing, in the homelier Gaelic--