they had only covered four blocks. To make matters worse, Cassidy was now leaning out of the window and looking down toward his right front wheel, whence a thin wisp of steam was issuing.
"What's the matter?" called Speedy. "Is this old can going on the blink?"
"Cooling system ain't workin' too well," admitted Cassidy. "But she'll hold out all right. She always has."
The cop's whistle shrilled and the jerky journey was resumed. They reeled off six blocks without interruption and Speedy began to breathe more easily. But clouds of steam were now unmistakably billowing up from the radiator of the car, even covering the front of the windshield and obscuring the driver's view. Suddenly Cassidy whirled the car around the corner at right angles and on two wheels and, before Speedy could protest, they had darted into a garage. Speedy and Cassidy tumbled out of the car almost together.
"Hey, what's the idea?" accosted Speedy. "Haven't I got trouble enough without this happening?"
"Just a second, buddy," soothed Mike Cassidy. "I'll dump a little cold water in the radiator and she'll be O.K."
But at that instant both jumped six inches off the floor of the garage as a siren sounded just in front of them. They looked up to find a closed car, with engine running and a greasy, overalled mechanic at the wheel, looming the other side of the taxi. The word "Ambulance" was written across
