"The only trouble is we can't carry the heavy car with us," replied Tom. "It's too big to pick up and take to a charging station."

"Then we've got to wait until some one comes along with a team of horses, and tows us in," commented Mr. Sharp. "And that will be some time, on this lonely road."

Tom shook his head despondently. He went all over the car again, but was forced to the first conclusion, that the reserve current had leaked away, in consequence of the meddling prank of the youth at the hotel. The situation was far from pleasant, and the delay would seriously interfere with their plans.

Suddenly, as Tom was pacing up and down the road, he heard from afar, a peculiar humming sound. He paused to listen.

"Trolley car," observed Mr. Sharp. "Maybe one of us could go somewhere on the trolley and get help. There it is," and he pointed to the electric vehicle, moving along about half a mile away, at the foot of a gentle slope.

At the sight of the car Tom uttered a cry. "I have it!" he exclaimed. "None of us need go for help! It's right at hand!" His companions looked curiously, as the young inventor pointed triumphantly to the fast disappearing electric.

CHAPTER XXIV

ON THE TRACK

"What do you mean?" asked Mr. Damon. "Will the electric trolley pull us to a charging station?"