Ames. It's quite likely that you would never have known of his presence in town. But what happens? You walk right into an adventure. One thing leads to another, and suddenly a stranger is trying to run you down with a motorboat."
"That's what bothers me," Rick replied. "There's no pattern. It just makes no sense."
"It doesn't have to," Tony Briotti said with a grin. "The Golden Skull pattern makes no sense, either. But you got us into more excitement than I knew was possible. You're just adventure-prone."
"And for the sake of my gray hair, stay out of trouble," Zircon pleaded. "Stay close to us until we get to Clipper Cay."
"It will be a pleasure," Rick assured him. "Only let us out of your sight long enough to shower, please. I'm sticky."
"We'll stay in the hotel," Scotty promised.
"Fine. I'll feel better about it if I know where you are. Suppose you come by in an hour and we'll have a quiet dinner at the Ernsts'."
Dinner was quiet but interesting. The Ernsts were excellent hosts, and both Dr. and Mrs. Ernst had many tales of the islands to tell. As the good doctor had promised, the boys enjoyed the wonderful variety of sea life Mrs. Ernst had collected to keep in salt-water tanks. She identified for them a number of the smaller reef fishes, including clowns, demoiselles, and even the deadly scorpion fish.
The party broke up early, since the start for Clipper Cay was to be made at dawn by the scientists. The plan was for Zircon and Tony to make the trip in the Water Witch, with the boys flying over in the Sky Wagon. That way, both the plane and boat would be available. Zircon thought that fast trips to St. Thomas might be necessary to replenish supplies, and he added that he would be happier if the plane were available in case of accident. That way, the patient could be in Charlotte Amalie in a short time.
As the boys bade good night to the scientists and started up the stairs to their room, Rick asked, "Any sign of a shadow tonight?"
"Nope. Guess Steve's friends – or enemies – must have lost interest."
"I hope that you're right. As long as Steve ordered us to stay out of the case, I'll be glad when we get to the cay and get underwater. We have to find that precious gadget even if it takes two solid weeks of diving. If we don't, Barby will never let us forget it."
This last was uttered as Rick turned the key in the lock and pushed the door open. He flicked on the light, then gave a sudden gasp.
The shadow and a stranger – in their room!
The boys looked into the muzzles of .38-caliber pistols.
"Come on in quietly," the stranger said. "Put your hands on the tops of your heads and sit down on the bed over there."
The boys did so. They had no alternative. Rick's mind raced. Somehow they had to warn the scientists, and they had to get out from under the muzzles of the guns! What could these men want of them?
The stranger sat down on the other bed. His pistol muzzle was centered precisely on Rick's belt buckle. "We want information. Give it to us without any trouble and we'll go away. Give us a hard time and you'll regret it."
Rick studied the stranger. He was of medium height, dressed in tan slacks and sport shirt with a darker jacket. His face was ordinary. He might have been a store clerk, or streetcar conductor, or nearly anything. But Rick saw from the way his jacket fitted that he was powerfully built for his size, and his hands were lean and strong-looking. He had a heavy tan, as though he had spent many months in the sun.
"What do you want to know?" Scotty asked.
"Let's start with what you were saying when you walked in. Who is Barby?"
"My sister," Rick said. "She's at home, in New Jersey."
The stranger sighed. "I was afraid of this. Give us straight answers or you'll buy plenty of grief. Now, who is Barby? Who does he represent?"
"He told you," Scotty answered. "She's his sister."
The stranger tried a different tack. "How did you know where to swim today? Did Ames tell you?"
"No," Rick replied. "We just swam straight out from the pier looking for coral heads."
"Come on! You must have had some source of information. Who gave it to you?"
"We didn't have any source of information," Scotty protested. "We just went for a swim!"
The stranger lifted the pistol menacingly. "You'd better sing, and it better be straight. I'm warning you!"
"Warn all you like," Rick said angrily. "What do you want us to say?"
The shadow walked over and pulled back his fist.
"Lay off!" the stranger growled. "You've pulled enough stupid stunts for one day. You'll be lucky if the boss doesn't rip the hide off you."
The former tail subsided and glared at the boys.
The stranger rose. "All right. If you won't talk here, we'll take you where you will talk. Get up."
The boys looked at each other. Scotty raised his eyebrows. Rick grinned. He asked calmly, "Suppose we don't go?"
"You'll go!" the stranger snapped.
"I don't think we will," Scotty answered. "Look, mister. You're in a hotel. It's early, and there are people in the lobby. How far do you think you'd get if you tried to march us downstairs with a gun in your hand?"
"We're not going through the lobby," the stranger told them. "We're going the way we came – through the window. And you'll go quietly or we'll take our chances. They might catch us, but you wouldn't care with a couple of slugs in you. Pete, go outside and wait. They'll come down one at a time. Keep them covered, and don't hesitate to shoot if they try anything."
The shadow slipped through the window, hung by his hands, and dropped.
The stranger's gun singled out Rick. "Get going."
Rick shrugged. There was nothing else to do but obey – at least for the moment. He looked at Scotty, and his pal made a small gesture to the right. Rick's forehead wrinkled. This was no signal he recognized, unless Scotty meant to jump to the right.
He swung a leg over the sill and looked down. The shadow was waiting, and the light from the window glinted dully off the gun in his hand. Rick went on out, then holding by his hands he gave a swing to the right and dropped. The gun covered him as he rose to his feet again.
"Against the wall!" the shadow hissed.
Rick dutifully moved back against the wall. The shadow was standing about six feet away.
Overhead, Scotty was climbing through the window now. Rick watched carefully as his pal lowered himself to full length, and swung to the left.
Instantly Rick divined Scotty's tactics. If the two boys were apart, the gun couldn't cover both of them at the same moment, and there would be an instant while the stranger jumped when only a single gun would be on them. And the shadow had already shown that he wasn't the smartest man in the world. Rick slipped to the right a step or two while the shadow was distracted by Scotty's jump. Scotty fell to his knees, and in getting up he managed to put a few more feet between himself and Rick.
"Watch 'em!" The stranger's
