Wires were run from the amplifier through the rear-seat windows, which were opened just enough to take the thin cables. The leads were then brought out to the plane's struts. Two large loud-speakers were attached to the struts. At first there was some difficulty in figuring out a secure attachment, but the chief engineer, a resourceful type, managed to find a pair of U bolts somewhere in the hangars. They did the job nicely. The chief engineer connected up, then hung the microphone between the two front seats. He threw a switch and the inverter started up with a whine. At the throw of a second switch, the loud-speakers broke into a hum. The engineer tapped on the microphone, and the tap, greatly amplified, reverberated across the airstrip. "It works!" Rick exclaimed, delighted. "_Cómo no?_" the engineer said with a smile. He spoke to Montoya in Spanish. The officer translated. "There is one more thing. He has rigged a cable with a switch box so you can operate the controls from the front seat. When the cable is attached, you will be ready. I will go call my uncle." Rick and Scotty watched as the engineer got busy, hooking the remote-switch cable into the amplifier. "Room for only two," Rick pointed out. "Want to toss for it?" Scotty shook his head. "It was your idea. I'll stay on the ground. Take the governor and talk those troops into submission." "Maybe," Rick said. "We'll see. I think it depends on whether or not they know the real story. If they have any idea there are diamonds around, they won't be interested in anything else." "Guevara wouldn't dare to let them in on it," was Scotty's opinion. "I'll bet they're just following orders, with no idea what's behind all this. Most of them probably think there really is a national security conference going on." Rick thought Scotty was probably right. Time would tell. He waited until the engineer signaled that the job was done, then climbed into the pilot's seat. He checked the plane over. Plenty of gas. Everything seemed okay. He tried the loud-speaker switches, then spoke into the microphone. He could hear his voice boom out with thunderous amplification and saw Scotty clap his hands to his ears. Finally, he started the motor and let the plane warm, keeping an eye on his gauges. When the manifold temperature got high enough he cut the switch. He tested the control surfaces and he was satisfied. Now all he needed was the governor. Governor Montoya arrived within ten minutes. He inspected the plane and its equipment and nodded his approval. "Very ingenious. Shall we try it?" "Yes, sir." Rick helped the governor in, buckled his safety belt, then ran around and got into the pilot's seat. He started the motor, waved to Scotty and the others, then taxied out to the runway. The tower gave him clearance and he took off. "We'll make a swing over the area and locate the troops," he explained, "then I'll slow down as much as I can, and you can talk."