Seven miles up the road a truck came down from Boulder Lake. Lockley placed himself discreetly out of sight. He turned on his instrument. A gun flew to pieces with a thunderous detonation. The truck crashed. It was interesting to Lockley that automobile engines invariably went dead at about the time that explosives went off. The fact was, of course, that ionized air is more or less conductive. In an ion cloud the spark plugs shorted and did not fire in the cylinders.
There were two other vehicles which essayed to pass Lockley as he went on up the long way to the lake. Both came from the interior of the Park. He left them wrecked beside the highway. Between times, he walked with a dogged grimness toward the place where Vale had been the first to report a thing come down from the sky. That had been how many days ago? Three? Four?
Then Lockley had been a quiet and well-conducted citizen inclined to pessimism about future events, but duly considerate of the rights of others. Now he'd changed. He felt only one emotion, which was hatred such as he'd never imagined before. He had only one motive, which was to take total and annihilating vengeance for what had been done to Jill.
He plodded on and on. He had to make a march of not less than twenty miles from the Park's beginning. He journeyed on foot because there were terror beams to pass and automobile engines did not run when his protective device operated. He could not arm himself from the cars that ditched, because all chemical explosive weapons and their ammunition blew at the same time. He was a minute figure among the mountains, marching alone upon a winding highway, moving resolutely to destroy—alone—the invaders from outer space and the men who worked with them for the conquest of earth. For his purpose he carried the strangest of equipment, a device made of a pocket radio and a cheese grater.
He had food in his pockets, but he could not eat. During the afternoon he became impatient of its weight and threw it away. But he thirsted often. More than once he drank from small streams over which the highway builders had made small concrete bridges.
At three in the afternoon a truck came up from behind. Here he trudged between steep cliffs which made him seem almost a midget. The highway went through a crevice between adjoining mountainsides. There was no place for him to conceal himself. When he heard the engine, he stopped and faced it. The truck had picked up many men from wrecked cars along its route. There were scorched and scratched and wounded men, hurt by the explosion of their firearms. The truck brought them along and overtook Lockley.
He waited very calmly since it did not seem likely that they would realize that one man had caused the crashes. The driver of the truck with the picked-up men did not even think of such a thing. Lockley seemed much more likely the victim of still another wreck.
The overtaking truck slowed down. There would be no strangers in Boulder Lake Park. There would only be the task force aiding the monsters, as Lockley reasoned it out. So the truck slowed, preparatory to taking Lockley aboard.
At a hundred and twenty-five yards from Lockley, weapons in the truck cab blew themselves violently apart. The engine, stopped in gear, acted as a violently applied brake. The truck swerved off the highway. It turned over and was still.
Lockley turned and walked on. He considered coldly that it was perfectly safe for him to go on. There were no weapons left behind him. The men themselves were shaken up. They would attempt to make no trouble beyond a report of their situation and a plea for help. The report could be made by the radio, which was not smashed.