"Listen," he said excitedly. "If the government radio station has a loud-speaker system, or can make one, we can put it in my plane. I can fly the governor over the troops and he can talk to them direct. My plane can go slowly enough, and low enough for that!" "How about power supply?" Scotty asked. "There must be an inverter on the island somewhere. We can use automobile batteries, and the inverter will give us 110 AC for a while, until the batteries run down. Just twenty minutes of power would be enough and we can get that with enough batteries!" Scotty chuckled. "The Brant approach," he said. "There always is one. How about it, Captain?" "We will try," Montoya said decisively. "You have not eaten?... Then do so, while I make a phone call to the radio station. I have had coffee and rolls, and perhaps there will be time to join you for more breakfast while the radio engineers get the equipment together." The boys were just finishing ham and eggs when Montoya returned. There was a broad smile on his tired face. "The engineers say it can be done. They have a portable loud-speaker system, and there is an inverter, as you call it, at the transmitter. What is this inverter?" "It's an electric generator," Rick explained. "Battery current turns it, and it produces 110-volt alternating current. But inverters aren't very efficient, and they take a lot of battery current. That's why we'll need as many batteries as we can carry." "The chief radio engineer said he understood exactly what was needed. He will gather the materials and meet us at the airport. Now, I think we have time for coffee, and perhaps I can follow your example with ham and eggs. It will take an hour for the equipment to be ready. Also, I called my uncle. He will be waiting for our call." "Did you get any sleep last night?" Scotty asked. Montoya smiled. "Sleep? I have forgotten what it is. But perhaps if this plan of yours works, I will remember, eh? Then I can sleep tonight." A check with the hotel desk told Rick that the scientists had left word that they were not to be disturbed until later in the morning except for an emergency. They had worked a good part of the night, apparently with no satisfactory results. The boys waited until Ricardo Montoya had breakfasted, then rode with him to the airport. There was another wait while the radio engineers arrived, bringing the loud-speaker equipment. Rick supervised the placement of the amplifier in the rear seat. The inverter was placed on the floor, and wedged into place with scrap lumber. The automobile batteries were put into the luggage compartment behind the rear seat and were also wedged in place.