“That’s—so,” panted Dick. He decided that the other two must be both fleeter and more agile than he, with his fat; so he returned with Sandy, to a point where they saw that the door was in the same relative position they had left it—wide.

“I don’t think we need to stay here—both of us,” Sandy said. “And if Jeff went into the house, he may have come out. Suppose he plans to get hold of that life preserver, and the woman was sent ahead to get us all away—” He considered that, then went back to his original idea, “Then it would be a good thing for me to get back to where I can watch that amphibian.”

Dick agreed.

He went inside the hangar, closing the door, and resumed his vigil.

In a short time two others returned, to knock on the door and to inform Dick, when he opened it, that the woman, clever planner that she proved herself, had arranged the small motor-boat of the estate so that its engine was going; by a ruse she had gotten far enough ahead of them while they stopped to “capture” her discarded coat after she had cried out as if she had stumbled. That enabled her to get to the boat. They had no way to overtake her as she swept out of the inlet. Evidently she had started the boat motor in the afternoon while they were away, or they would have heard the roar of the start though no one had noticed the softer purr of it as it idled.

Then they went into the hangar and Mr. Whiteside, listening to Dick’s report, from Sandy, of Jeff’s movements, swung his flashlamp around.

From each came an amazed, horrified gasp.

The life preserver was gone!

CHAPTER XXXII
A DOUBLE PURSUIT

“Keep your heads, boys,” counseled Mr. Whiteside.