It was too cold by far for safe swimming. All the snows of Sulitelma could hardly have made the waters more chilly to the swimmer than they felt at the first plunge. But Rolf would not retreat for this reason. He thought of the sunshine outside, and of the free open view he should enjoy, dived beneath the almost closed entrance, and came up on the other side. The first thing he saw was the schooner, now lying below his island, and the next thing was a small boat between him and it, evidently making towards him. When convinced that Hund was one of the three men in it, he saw that he must go back, or make haste to finish his expedition. He made haste, swam round so close as to touch the warm rock in many places, and could not discover, any more than before, any trace of a footing by which a man might climb to the summit. There was a crevice or two, however, from which vegetation hung, still left unsearched. He could not search them now, for he must make haste home.
The boat was indeed so near when he had reached the point he set out from, that he used every effort to conceal himself; and it seemed that he could only have escaped by the eyes of his enemies being fixed on the summit of the rock. When once more in the cave he rather enjoyed hearing them come nearer and nearer, so that the bushes which hung down between him and them shook with the wind of their oars, and dipped into the waves. He laughed silently when he heard one of them swear that he would not leave the spot till he had seen something, upon which another rebuked his presumption. Presently a voice, which he knew to be Hund's, called upon his name, at first gently, and then more and more loudly, as if taking courage at not being answered.
"I will wait till he rounds the point," thought Rolf, "and then give him such an answer as may send a guilty man away quicker than he came."
He waited till they were on the opposite side, so that his voice might appear to come from the summit of the islet, and then began with the melancholy sound used to lure the plover on the moors. The men in the boat instantly observed that this was the same sound used when Erlingsen's boat was spirited away from them. It was rather singular that Rolf and Oddo should have used the same sound; but they probably chose it as the most mournful they knew. Rolf moaned louder and louder, till the sound resembled the bellowing of a tormented spirit enclosed in the rock; and the consequence was, as he had said, that his enemies retreated faster than they came.