running for the lad had established the connection, in spite of his shock and his father and Mr. Sharp had decided to let the machinery run until he came back.
"And look at the record it's made!" cried Tom delightedly as he glanced at the gauge. "Better than I figured on. That battery is a wonder. I'll have the fastest electric runabout you ever saw."
"If the wires don't get crossed again," put in Mr. Sharp. "You'd better make an examination, Tom," and, for the first time, the young inventor learned how he had been shocked.
"Crossed wires! I should say they were crossed!" he exclaimed as he looked at the switches and copper conductors. "Somebody has been tampering with them. No wonder I was shocked!"
"Who did it?" asked Mr. Sharp.
Tom considered for a moment, before answering. Then he said:
"I believe it was Addison Berg. He must have wanted to do some damage, to get even with us for getting that treasure away from him."
"Berg?" questioned the balloonist, and Tom told of the night he had been tripped into the brook, and exhibited the watch charm he had
