He would have considered far more seriously the attention they paid to his movements by night, if he had but known of them. If he could have seen six pairs of eyes, striving to discern him as he appeared on the hotel roof, or have known of the youths who watched lest he cross the cove under cover of night, to say nothing of those who awaited his coming on the bluff itself, he might have worried more than he did, and perhaps have played a shrewder game. But neither did he nor any one else, other than they who watched, know of it. And so it was that when, a little before sunset on the third day after the arrival of the ghosts in the haunted house, and while Mr. Kemble sat on the front piazza of the hotel, looking through a field-glass off on to the bay, admiring its beauties with Mrs. Carlin, who thought him such an unfortunate man,—and while, as he looked, he saw the very yacht for which he had waited anxiously for days, he surely believed that there was no one in the village who would regard it with other than the usual curiosity that fishermen and yachtsmen have for a strange craft. In this, unfortunately for him, he was mistaken. There were others besides him who, on seeing the sail emerge from between the islands, regarded it with equal interest and even more excitement. Henry Burns, being deeply interested in it, came and sat down beside Mrs. Carlin long enough to hear Mr. Kemble remark that he believed the yacht was the _Eagle_, with his friends; in which case he should spend the night aboard with them, and leave the harbour early in the morning, if the wind availed. Henry Burns then quietly took his departure, sauntering along until some cottages shut him out from the view of the hotel, and then starting off on a run as hard as ever he could toward the Warren cottage. He paused long enough at the cottage to communicate the news to young Joe, who was the first one he met, and then, calling out that he would return as quickly as he could, he ran through the woods down to the shore. Going up the cove some distance, Henry Burns launched a rowboat and pulled rapidly across, landing some ways above the bluff. Then he struck down through the woods for the haunted house. When Henry Burns returned a few minutes later, two of the detectives were with him. The three rowed across the cove and proceeded to the Warren cottage. There the plan of operation, as it had been mapped out by Miles Burton, was told by Henry Burns. Burton and Mason were to make the arrest at the haunted house. It was extremely unlikely that more than two of the robbers would come for the box of jewels,—perhaps Craigie alone. At all events, the detectives would take chances against more than two coming, and, if the three came, it would make no difference to them. They would take them all by surprise, and could arrest a dozen if necessary. If two of the boys chose to go over to the bluff, they could do so, but Miles Burton would not advise them to take the risk.