"But where did all those men come from?"
"That's what we're going to find out. There must be some connection between this cove and the house on the cliff. I'm going ashore."
"Somebody's got to stay with the motorboat," said Tony. "I'm not afraid to go in there, and if it comes to a dare, I will go, although I don't want to be killed. But we can't leave the boat here, that's certain."
"I'll tell you what to do," said Frank. "Let Joe and me go ashore. Then we'll try to follow those men in the boat and see where they go. If we let them slip out of our hands now we may lose them altogether."
"And shall I wait?"
"No. You go back to Bayport and get help—lots of it."
"The police?"
"The federal men. Tell them we're on the track of the smugglers. If Joe and I discover anything we'll wait here at the entrance to the cove and put the police on the right track when they get here."
"Good!" said Tony. "I'll put you ashore right away."
"Don't go too close or you'll wreck the boat. Joe, I guess you and I will have to swim ashore. Then we'll go around into the cove and find out all we can."
Tony edged the boat in as close to the gloomy
