"It would take a wizard to understand what you intend to do."

"Well, you will see later on. Drive in this gate. That's it, and now for the shovels."

[!-- CH19 --]

CHAPTER XIX.

THE TRAP.

For more than half an hour eager inquiries were made in Millbrook for a spark plug such as they wanted. But all their search was to no avail. But suddenly, just as they were about to give up in despair, a man, of whom they had made inquiries, recalled that not far out of town there was a small garage.

"We'll try there," determined Jimsy.

Finding out the road, they speeded to the place. It did not look very promising, a small, badly fitted up auto station, run by an elderly man with red-rimmed, watery eyes, looking out from behind a pair of horn spectacles that somehow gave him the odd look of a frog.

"Got any spark plugs?" asked Jimsy, as the machine came to a halt.

"Yes, all kinds," said the man, in a wheezy, asthmatic voice that sounded like the exhaust of a dying-down engine.