Sandy kicked out of his bedroll and scrambled up on the table. Jerry and Quiz dove headlong onto the bunk. In a more leisurely fashion, Russ Steele and the ranger sat down on high stools.

They had just settled themselves when they were blinded by a tremendous ball of blue fire that shimmered in mid-air just outside the north window. An instant later, they were deafened by an explosion that sounded like the end of the world. The tower bucked madly, and Sandy was sure it was going to topple over or collapse. Gradually his vision cleared to reveal the most terrifying sight that he had ever witnessed in his entire life. The whole room was full of tiny blue sparks that sizzled as they ran in chains across the icebox and stove and along the metal strips of molding that trimmed the edges of the floor and ceiling. Everything metal was encircled by a sparkling halo. He could scarcely believe his eyes when he looked at the other people in the room. Quiz Taylor’s long hair was standing up perfectly straight on his head like a brush; the same was true of his uncle and Dick Fellows. His own scalp tingled strangely, and he could feel it bristle. Only Jerry’s close crew-cut was unaffected.

“Don’t be frightened,” the ranger said calmly. “There’s no danger as long as you sit tight.”

“On the contrary,” Quiz said brightly. “I wouldn’t have missed this for the world.” He grinned as he touched a hand to his hair. “A fascinating phenomenon of static electricity. Those sparks, too; they’re harmless.”

“You and your education!” Jerry moaned. “I’m petrified. Say, how long do these things last?”

The ranger shrugged. “Hard to say. Maybe ten minutes; maybe an hour.” His face was grave with concern. “And every minute it lasts increases the chance of one of those bolts starting a fire. If only it would rain!”

Sandy suddenly remembered the dog, who had remained below on the ground. “Poor Prince. I wonder how he’s taking this?”

The ranger smiled. “Unless I miss my guess, he’s holed up under my dynamo shack out back—along with an assortment of rabbits, squirrels and chipmunks. There’s nothing like a little lightning to make buddies out of natural enemies.”

“I wish I was with him,” Jerry said, “instead of sitting on top of this giant lightning rod.”

Abruptly it began to rain, a driving downpour, and miraculously, it seemed to Sandy, the lightning stopped. The boys began to cheer and crowded against the windows, watching the drops pelt the treetops below. But their elation didn’t last very long. In less than five minutes, the rain ceased, as if a giant sprinkler had been turned off. Within a quarter of an hour, the clouds disappeared and the sun beamed through. Thin wisps of steam began to rise from the leaves, giving the illusion that the entire forest was smoking.