The crack, however, went down only about three feet, gradually narrowing until it was closed. Even so, it was impressive. Rick knew that the actual break must continue down into the earth for some distance, perhaps for hundreds of feet. The force it took to shake the earth like that was awesome. Again he was reminded sharply of the kind of forces against which the Spindrift group was trying to contend, and he felt for the first time that the job was completely hopeless. What could mere men do? A horn honking wildly brought him to quick attention. He turned and saw a jeep coming along the western road into the parking lot. Brad Connel! But where was Ruiz? Then, as the jeep neared, Rick saw. The San Luzian was lashed to an improvised stretcher lying across the back of the jeep! The geologist drew to a stop, his face chalky. "Get a doctor!" he shouted. "Quickly! Ruiz got caught in the last explosion. I think he's dead!" CHAPTER IV Seismic Tracings Ruiz, the short, friendly San Luzian, was not dead, but he was only barely alive. Within a half hour he was on his way to the hospital at Calor, crushed and unconscious. Brad Connel was badly shaken. "I thought he was behind me," the geologist explained. "But he had gone back to check the cap connection. At least, that's what he must have gone back for. I fired, then turned around, and he wasn't there. He was blown fifty feet at least. If only I had checked! But he was there with me, and I just kept my eye on the chronometer. He didn't say anything. He just walked off." There was nothing much to be said. It was the kind of accident that seems absolutely senseless. Both Connel and Ruiz were old hands with explosives, yet the San Luzian apparently had wandered back to the charge just as it went off. Rick and Scotty walked toward the hot springs behind the hotel and talked it over. "Pretty stupid thing for anyone to do," Scotty said soberly. Rick agreed. "Especially an old hand. Ruiz was supposed to be experienced, but I can't imagine how a veteran could pull a stunt like that." It made absolutely no sense. Ruiz spoke English. Rick knew that from his conversation with the San Luzian. So he must have known Connel was counting down, getting ready to push the plunger home. Why would he walk into the blast, unless he was tired of living? But he didn't believe Ruiz would try to get himself killed deliberately. The little San Luzian had seemed like a sane, happy individual. Rick gave up. Maybe when Connel calmed down a little he could shed more light on the accident. "The smell from the springs is getting pretty strong," Scotty remarked. It certainly was. The wind had been from the hotel toward the hot springs most of the day, and the odor hadn't been bad. Now, in the vicinity of the springs, it was making Rick's eyes water and his nose smart. "Think we can get close enough for a look?" Rick asked. "We can try. There's the building ahead."