On hearing this, Olaf Triggvison gave the ship captain a message to take back to his master, bidding Sweyn remember the vow he had sworn at his inheritance feast, and saying that if he had a mind to fulfil that vow he might now make the attempt, for that he--Ole the Esthonian--was now preparing his forces for a great invasion of England, and would be well pleased if Sweyn would join him in the expedition. The place of the gathering of the forces was to be Ipswich, in East Anglia, and the time of meeting was to be the middle of the harvest month in the next summer.
Olaf did not wait in the Orkneys for an answer to this message. His vikings were already growing weary of idleness and eager to be again upon the sea. So the ships were put in readiness, and when a fair wind offered, the anchors were weighed and the sails set, and the fleet sped westward through Roy Sound towards Cape Wrath. Thence they sailed down among the Hebrides--or the Southern Isles, as the Norsemen always called them. Here Olaf had many battles and won many ships from the descendants of Harald Fairhair's rebel subjects, who had made settlements in the Isles. Here, too, he gained some hundreds of men to his following. He harried also in the north parts of Ireland, and had certain battles in the Island of Man. By this time the summer was far spent, so he sailed east away to Cumberland and there rested throughout the winter.
His men thought that this part of England, with its mountains and lakes, was so much like their own birthland in distant Norway, that they showed great unwillingness to leave it. Many did, indeed, remain, and the settlements they made in the lake country have left traces which even to the present day may be recognized, not only in the remains of heathen temples and tombs, but also in the names of places and in certain Norse words that occur in the common speech of the Cumbrian folk.
From Cumberland Olaf sailed south to Wales. There again he harried wide about, and also in Cornwall, and at length he came to the Scilly Isles. King Athelstane had conquered these islands half a century before, and had established a monastery there, the ruins of which may still be seen.
Now when Olaf Triggvison lay at Scilly, sheltering from a storm that had driven him out of his intended course, he heard that in the isle of Tresco there was a certain soothsayer who was said to be well skilled in the foretelling of things which had not yet come to pass. Olaf fell a-longing to test the spaeing of this man.
"I will try him by means of a trick," Olaf said one day to Kolbiorn; "and in this wise: You shall go to him instead of me, and say that you are King Ole the Esthonion; and if he believes you, then is he no soothsayer."
Now Olaf was already famed in all lands for being fairer and nobler than all other men, and he chose Kolbiorn as his messenger because he was the fairest and biggest of his men and most resembled himself, and he sent him ashore, arrayed in the most beautiful clothing.
Kolbiorn searched long among the trees and rocks before he found the little cave in which the lonely hermit dwelt; and when he entered he saw a gray bearded old man, deep in meditation before a crucifix, and wearing the habit of a Christian priest.
The hermit looked up at the tall figure of his visitor, and waited for him to speak. Kolbiorn answered as Olaf had bidden him, saying that his name was King Ole. But the hermit shook his head.
"King thou art not," said he gravely; "but my counsel to thee is, that thou be true to thy King."