“I think you’re right,” agreed the professor, as he turned and looked at a bank of ugly dark clouds in the southwest. “A thunder shower is coming up, if I’m any judge. There doesn’t seem to be any shelter, either.”

As far as they could see there was nothing but a vast stretch of wild country, though, far to the north, there was a dark patch which looked as if it was a forest.

“It’s coming just at the wrong time,” remarked Jerry, who was steering. “I was in hopes the storm would hold off a bit. Well, we shan’t melt if it does rain.”

And that it was soon going to pour in the proverbial buckets full was evident. The wind began to blow a half gale, and the clouds, from which angry streaks of jagged lightning leaped, scurried forward. At the same time low mutterings of thunder were heard.

“We’re in for it,” cried Bob.

The next instant the storm broke, and the whole landscape was blotted out in a veil of mist and rain which came down in sheets of water. Now and then the darkness would be illuminated by a vivid flash of fire from the sky artillery, and the thunder seemed to shake the earth.

Jerry could barely see where to steer, so fiercely did the rain beat down. Fortunately they had time to put on their raincoats before the deluge hit them.

The provisions and other things in the auto had, likewise, been covered up with canvas, so little damage would result from the downpour.

“Look out!” yelled Ned suddenly to Jerry. “There’s something ahead of us!”