“I’ll come aboard and look you over,” the officer said.

The police boat started slowly and swung nearer. In that instant the Black Star’s engineer acted. He threw on the power and dropped, for the wheel was locked. The screw churned the water and hurled a great wave at the police boat.

Behind, the men in the police boat were shouting, and a fusillade of revolver shots spattered around the Black Star’s craft. But the police found themselves at a disadvantage. The Black Star’s launch was swifter, and the police boat was headed the wrong way and had to be turned. While the turn was being accomplished, the firing continued, and the searchlight kept the prey in sight but that prey was gradually putting distance between itself and the boat behind.

The Black Star’s boat was a hundred yards in the lead by the time the police launch had straightened out and taken up the chase in earnest. The grim race was on, with the police firing at times, and the searchlight always playing on the vessel ahead. The Black Star had crawled from beneath the sacks now, and was directing operations.

“All the speed you have, and get around the bend,” he ordered. “We can leave the boat and take to the touring cars. We’ll be lost in the city before they can telephone headquarters or get cars and trail us!”

The bend in the stream was not far ahead now, and the master criminal issued further orders. The two prisoners were treated to shots from the vapor gun again. The siren of the launch shrieked a message to the men ahead waiting with the touring cars.

Around the bend—and the launch dashed for the shore. As it was reached, the police boat came into view, its searchlight trying to pick up the quarry. The Black Star and his men tumbled out, carrying the prisoners. From the road a short distance away came the honking of an automobile horn.

Then the searchlight struck them, and the police launch turned and headed for the shore. More flashes of flame split the darkness, and bullets whined through the trees and underbrush.

But the Black Star and his men were in the dense woods now and hurrying along a narrow path that led to the road. They reached the two waiting motor cars and tumbled in, and the automobiles started toward the city.

The police were just leaving their boat and rushing into the woods, flashing their pocket torches, their revolvers held ready, calling to one another. They reached the road in time to hear the roaring of two motors and to see two cars disappearing down the highway. They wasted another fusillade of shots, and then hurried back toward the boat.