The almanacks avouched that on this Saturday there would be an unusually low tide, soon after twelve o’clock, and Fergus had set his heart on investigating the buried forest that there was no doubt had been choked by the combined forces of river and sea.  So Anna found that notice had been sent to Clipstone of his intention of devoting himself to the cove and not coming home till the evening, and that his uncle and aunt did not think there was any danger, especially as his constant henchman, Davie Blake, was going with him, and all the fisher-boys of the place were endowed with a certain instinct for their own tides.  The only accident Jane Mohun had ever known was with a stranger.

Anna had no choice but to subside, and the boys started as soon as the morning’s tide would have gone down sufficiently, carrying baskets for their treasures containing their luncheon, and apparently expecting to find the forest growing upright under the mud, like a wood full of bushes.

The cove for which they were bound was on the further side of the chain of rocks, nearly two miles from Rockquay, and one of the roads ran along the top of the red cliffs that shut it in, with no opening except where the stream emerged, and even that a very scanty bank of shingle.

In spite of all assurances, Anna could not be easy about her darling, and when afternoon came, and the horses were brought to the door, she coaxed Gerald into riding along the cliffs in the Anscombe direction, where there was a good road, from whence they could turn down a steep hill into the village, and thence go up a wild moor beyond, or else continue along the coast for a considerable distance.

As they went out she could see nothing of the boys, only rocks rising through an expanse of mud, and the sea breaking beyond.  She would have preferred continuing the cliff road, but Gerald had a turn for the moor, and carried her off through the village of Anscombe, up and up, till they had had a lively canter on the moor, and looked far out at sea.  When they turned back and had reached the cliff road, what had been a sheet of mud before had been almost entirely covered with sparkling waves, and there was white foam beating against some of the rocks.

“I hope Adrian is gone home,” sighed Anna.

“Long ago, depend on it,” returned Gerald carelessly; but the next moment his tone changed.  “By Jove!” he exclaimed, and pointed with his whip to a rock, or island, at the end of the range of rocks.

He was much the more long-sighted of the two, and she could only first discern that there was something alive upon the rock.

“Oh!” she cried, “is it the boys-—I can’t see?”

“I can’t tell.  It is boys, maybe fishers.  I must get out to them,” he replied.  “Now, Anna, be quiet-—use your senses.  It is somebody, anyway.  I saw the opening of a path down the rock just now,” and he threw himself off his horse, and threw her the bridle.  “You ride to the first house; find where there is a Coast-guard station, or any fisherman to put out a boat.  No time to be lost.”