considerable experience in volcanology.
The scientific team departed at once for San Luz, leaving Rick and Scotty to bring up the rear. The boys loaded scientific equipment into the Sky Wagon and took off for San Luz. It took three days for the little plane to make the trip, the longest flight of Rick's flying career. Only once before had he flown so far over water, and then only to the Virgin Islands. The plane had made it easily, but he and Scotty had sweated it out.
Ordinarily, Hartson Brant would have taken the boys by commercial air, but he wanted Rick's plane on hand. Since the senior scientist did not know what difficulties the scientists might encounter, he wanted a way of making aerial surveys and photographs, plus ready communication with the mainland and nearby islands.
The boys had arrived early the evening before, only to be whisked to the Executive Mansion where the governor of San Luz, the Honorable Luis Montoya, was holding a reception for the visiting scientists.
The governor, a charming little man who looked like Rick's idea of a Spanish grandee, knew why the scientists were there, of course. But the secret was confined to the governor himself and to Balgos. Even Jaime Guevara, the lieutenant governor, did not know.
The agreement was that the scientific group would seem to be interested only in the hot springs. The purpose of their visit, the governor had announced to the local press and radio, was to investigate the change in the springs that had ruined a principal San Luz resort hotel.
By ten o'clock, when the reception ended, the boys were exhausted. But the end was not yet. They were riding in Zircon's jeep – five jeeps had been assigned to the party by the governor – and Zircon had to meet the last member of the party, Bradley Connel, a geologist borrowed from an oil company in Caracas, Venezuela, by Dr. Balgos.
It was nearly midnight before the boys got to sleep, after nearly three days with minimum rest. So, both were tired. In the middle of thinking how tired he was, Rick dropped off to sleep again.
He awoke with Scotty's voice in his ears. "Come on, old buddy. Dad's calling a staff meeting in fifteen minutes."
Rick sat up. "How do you know?"
"Didn't you hear the phone ring? Boy, you must be tired! Let's go. Time for a quick shower and coffee. I've had mine."
Rick saw that a breakfast tray was on a bedside table. He had slept through Scotty's arising, shower, and delivery of breakfast. He shook his head, still groggy.
A quick shower woke him up. He sipped coffee and ate toast while getting into his clothes, then the two hurried down the corridor of the luxury hotel to the conference room Hartson Brant had taken over as headquarters.
The scientists were already there, taking seats around the room as the boys walked in.
Rick looked at the new faces. It was the first time he had seen them in daylight. Dr. Jeffrey Williams was a plump, round-faced man with a shock of pure-white hair. Dr. David Riddle was tall, dark, lean, and heavily tanned. He looked like a mining engineer, or perhaps a forest ranger. Bradley Connel was short, heavy set, with straw-colored hair and the kind of complexion that is always sunburned and peeling so long as the days are hot – which meant always, this close to the equator.
"Let's get to work," Hartson Brant said. "It's obvious that visual inspection is not going to tell us much. We'll have to get tracings before we have any real idea of what's going on under us. Dave, have you found anything of importance?"
David Riddle shook his head. "It's a typical formation. Nothing unusual about it at all. El Viejo is simply a dead volcano, its cone filled in, and plenty of jungle on the slopes. The hot springs are just a seepage point, as Dr. Balgos knows. So far as I can tell, they're the weakest point, so if the mountain lets go, that is where the blowoff will come. Of course, this could be wrong and there may be weaker channels we don't suspect. We'll know when we start shooting."
Hartson Brant looked at Dr. Williams. "Anything to add, Jeff?"
"Not much. I've gone over the seismic data Esteben got from the seismologists in the area, and it's clear that the epicenter of most recent earthquakes in the area is right under us. Something is happening down in the earth under the mountain, but I can't say what it is. It may be volcanism or it may be a fault shifting."
Rick knew that a fault was like a great crack in the earth's structure, but he had thought the scientists had agreed that the earthquakes were caused by volcanic action. He asked, "Sir, doesn't the change in the springs mean something?"
"Perhaps, Rick," Dr. Williams answered. "We don't really know. Dr. Balgos thinks they mean a great deal, and I have respect for his opinions. But I'm only a seismologist. I have to depend on traces from earthquakes, and the traces tell us nothing but the single fact that something is going on far below."
Hartson Brant nodded. "The answer will depend on more data, so today we'll start to collect it. Rick and Scotty brought apparatus, and the governor has supplied us with dynamite and two experienced helpers, Ruiz and Honorario."
"How do we split up?" Julius Weiss asked.
"Into firing and recording teams. Since we have only two recorders, we can have only two teams for data collection. But we can have three firing parties. Dave Riddle will work with Honorario, Brad Connel with Ruiz, and Hobart Zircon with Rick and Scotty. Julius, you and I will form one recording party, and Esteben and Jeff will form the other. Each team will have a jeep. Now, if you'll all gather around this model the boys made, we'll pick approximate locations for stations."
The boys had brought the model with them. Now the group gathered around and discussed the best locations for both firing and recording parties.
Dave Riddle was assigned a station on the slope of El Viejo near the town of Redondo on the north end of the island. Brad Connel was given a location on the northwestern slope, and Zircon and the boys were shown a position on the west near the place where pumice, a foamy volcanic rock, was mined. Hartson Brant and Julius Weiss were to place one recording station on the eastern slope of the mountain, while Dr. Williams and Dr. Balgos were assigned a station on the northern coast.
Hartson Brant handed a wrist chronometer to each team leader. Each team was also to have a transit, with which to take bearings for the purpose of locating the stations with precision.
"The hotel restaurant has packed lunches for us," Hartson Brant stated. "If we get under way at once, we can start shooting at one o'clock. Let's try for three shots each this afternoon. Each firing team will move one mile in a clockwise direction between shots, and we'll need to space the shots fifteen minutes apart. Hobart, you'll start shooting at 1:00, Brad at 1:15, Dave at 1:30. At 2:00, we'll start the cycle over again. That should bring us all back to the hotel by suppertime."
Big Hobart Zircon clapped the boys on the shoulder. "Let's get going. Scotty, you pick up our lunches. Rick, we'll load equipment."
The five jeeps were lined up outside. Rick carried out a transit, the tripod slung over his shoulder, and found the two local helpers waiting. Ruiz was a short, swarthy man with gleaming white teeth and a Mexican-style sombrero. Honorario was only slightly taller, and so thin a strong breeze would blow him away. The two San Luzians greeted him courteously. "Buenos días, señor."
Rick knew enough Spanish to be equally polite. "Buenos días, señores. Cómo están ustedes?"
The two switched to English. Rick hoped it wasn't a reflection on his Spanish accent, acquired at Whiteside High School the year before. "We are well, señor," Ruiz answered, and Honorario added, "We hope you will enjoy San Luz, señor."
Rick
