With startled eyes he crossed the thyme-set ledge whereon stood Caisteal-Rhona. Was it, after all, a message he had received, and was that which had appeared to him in that lonely cavern of the sea but a phantom of his own destiny? Was he himself, Alan Carmichael, indeed Am Fàidh, the predestined Prophet of the isles?

V

Ever since the night of Marsail's death, Ian had noticed that Alan no longer doubted, but that in some way a special message had come to him, a special revelation. On the other hand, he had himself swung further into his conviction that the vision he had seen in the cavern was, in truth, that of a living man. On Borosay, he knew, the fishermen believed that the aonaran nan creag, the recluse of the rocks, as commonly they spoke of him, was no other than Donnacha Bàn Carmichael, survived there through these many years, and long since mad with his loneliness and because of the burden of his crime.

But by this time the islanders had come to see that Alan MacAilean was certainly not Donnacha Bàn. Even the startling likeness no longer betrayed them in this way. The ministers and the priests on Berneray and Barra scoffed at the whole story, and everywhere discouraged the idea that Donnacha Bàn could still be among the living. But for the common belief that to encounter the Herdsman, whether the lost soul of Donnacha Bàn or indeed the strange phantom of the hills of which the old legends spoke, was to meet inevitable disaster, the islanders might have been persuaded to make such a search among the caves of Rona as would almost certainly have revealed the presence of any who dwelt therein.

But as summer lapsed into autumn, and autumn itself through its golden silences waned into the shadow of the equinox, a strange, brooding serenity came upon Alan. Ian himself now doubted his own vision of the mysterious Herdsman—if he indeed existed at all except in the imaginations of those who spoke of him either as the Buachaill Bàn, or as the aonaran nan creag. If a real man, Ian believed that at last he had passed away. None saw the Herdsman now; and even Morag MacNeill, who had often on moonlight nights been startled by the sound of a voice chanting among the upper solitudes, admitted that she now heard nothing unusual.

St. Martin's summer came at last, and with it all that wonderful, dreamlike beauty which bathes the isles in a flood of golden light, and draws over sea and land a veil of deeper mystery.

One late afternoon, Ian, returning to Caisteal-Rhona after an unexplained absence of several hours, found Alan sitting at a table. Spread before him were the sheets of one of the strange old Gaelic tales which he had ardently begun to translate. Alan lifted and slowly read the page or paraphrase which he had just laid down. It was after the homelier Gaelic of the Eachdaireachd Challum mhic Cruimein.

"And when that king had come to the island, he lived there in the shadow of men's eyes; for none saw him by day or by night, and none knew whence he came or whither he fared; for his feet were shod with silence, and his way with dusk. But men knew that he was there, and all feared him. Months, even years, tramped one on the heels of the other, and perhaps the king gave no sign, but one day he would give a sign; and that sign was a laughing that was heard somewhere, upon the lonely hills, or on the lonely wave, or in the heart of him who heard. And whenever the king laughed, he who heard would fare ere long from his fellows to join that king in the shadow. But sometimes the king laughed only because of vain hopes and wild imaginings, for upon these he lives as well as upon the strange savours of mortality."

That night Alan awakened Ian suddenly, and taking him by the hand made him promise to go with him on the morrow to the Teampull-Mara.

In vain Ian questioned him as to why he asked this thing. All Alan would say was that he must go there once again, and with him, for he believed that a spirit out of heaven had come to reveal to him a wonder. Distressed by what he knew to be a madness, and fearful that it might prove to be no passing fantasy, Ian would fain have persuaded him against this intention. Even as he spoke, however, he realised that it might be better to accede to his wishes, and, above all, to be there with him, so that it might not be one only who heard or saw the expected revelation.