int," 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, however, did not stop
there; he 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. Never had they rowed more vigorously than now, fetching a
large circuit, to keep at a safe distance from the spot, as they passed
westward.

For the next few days Rolf kept a close watch upon the proceedings of
the pirates, and saw enough of their thievery to be able to lay
informations against them, if ever he should again make his way to a
town or village, and see the face of a magistrate. He was glad of the
interest and occupation thus afforded him,--of even this slight hope of
being useful; for he saw no more probability than on the first day, of
release from his prison. The worst of it was that the season for
boating was nearly at an end. The inhabitants were day by day driving
their cattle up the mountains, there to remain for the summer; and the
heads of families remained in the farm-houses, almost alone, and little
likely to put out so far into the fiord as to pass near him. So poor
Rolf could only catch fish for his support, swim round and round his
prison, and venture a little further, on days when the water felt rather
less cold than usual. To drive off thoughts of his poor distressed
Erica, he sometimes hammered a little at his skiff; but it was too plain
that no botching that he could perform in the cave would render the
broken craft safe to float in.

One sunny day, when the tide was flowing in warmer than usual, Rolf
amused himself with more evolutions in bathing than he had hitherto
indulged in. He forgot his troubles and his foes in diving, floating,
and swimming. As he dashed round a point of the rock, he saw something,
and was certain he was seen. Hund appeared at least as much bewitched
as the island i