A low moon hung over the poplars when Lees rang the Jouret front door bell. One detective was guarding a side door and the other a back door.

Suddenly Jouret was seen to jump from a second-story window. As he did, a car driven by one of his Porto Ricans came along the drive and he leaped into it. Lees, first to see Jouret, called his detectives. They came running. Their car was waiting in the road.

The Porto Rican was seen to jump from the Jouret car just as it started south towards New York.

Lees took up the race. Both cars had plenty of power, but the Jouret car suddenly disappeared as a low humming noise began to break the stillness of the night.

One of the detectives was at the wheel. Lees, as usual, was giving orders:

"Keep close to that hum. Never mind that you cannot see the car. It is there all right. If you can gain on it enough, drive right into it."

"Righto!" shouted the detective. "We're wise to him now."

The humming noise was taking on speed with every second. So was Lees' car. Soon Lees' car was making sixty miles an hour with the hum just ahead and barely audible.

Past traffic lights, over bridges and grade crossings the mad chase of the phantom continued.

Wildly racing through the night, missing other cars by a breath, the big, visible auto continued its pursuit of—what?