Suddenly, there was a gust of wind.
The side door of the cabin, through which Hanleigh had evidently entered, blew wide open.
With a mutter of astonishment, the man swung around. He looked toward the door.
The Hardy boys and their chums ducked beneath the level of the window sill. But they were too late.
Hanleigh had seen them. They heard a shout of consternation. Then they heard heavy footsteps on the cabin floor. The door slammed. Hanleigh came running around the side of the building.
“Hold your ground!” advised Frank quietly to his companions. “Don’t let him bluff us.”
Hanleigh, red with wrath, confronted them. He recognized the Hardy boys at once.
“Spying on me, are you?” he shouted. “I thought I told you boys to stay away from this island.”
“You told us,” returned Frank coolly.
“Then what do you mean by this?” roared Hanleigh. “What do you mean by coming back here again? I’ve a good mind to horsewhip the whole crowd of you. A bunch of meddling youngsters! Now get out of here and stay away. If I catch you fellows on this island again, I’ll—I’ll——”