Mittel’s answer was a hoarse, gasping shout to the police to hurry—­and then Mittel reeled back, measuring his length upon the wharf from a blow with a boat hook full across the face, driven with a sudden, untamed savagery that seemed for the moment to have mastered Jimmie Dale.

There was no time—­not a second—­not the fraction of a second.  Desperately, frantically he shoved the boat clear of the wharf.  Once—­twice—­three times he turned the engine over without success—­and then the boat leaped forward.  Jimmie Dale snatched the mask from his face, and jumped for the steering wheel.  The police were rushing out along the wharf.  He could just faintly discern Mittel now—­the man was staggering about, his hands clapped to his face.  A peremptory order to halt, coupled with a threat to fire, rang out sharply—­and Jimmie Dale flung himself flat in the bottom of the boat.  The wharf edge seemed to open in little, crackling jets of flame, came the roar of reports like a miniature battery in action, then the flop, flop, flop, as the lead tore up the water around him, the duller thud as a bullet buried its nose in the boat’s side, and the curious rip and squeak as a splinter flew.  Then Mittel’s voice, high-pitched, as though in pain: 

“Can’t any of you run a motor boat?  He’s got me bad, I’m afraid.  That other one there is twice as fast.”

“Sure!” another voice responded promptly.  “And if that’s right, he’s run his head into a trap.  Cast loose, there, MacVeay, and pile in, all of you!  You go back to the house, Mr. Mittel, and fix yourself up.  We’ll get him!”

Jimmie Dale’s lips thinned.  It was true!  If the other boat had any speed at all, it was only a question of time before he would be overtaken.  The only point at issue was how much time.  It was dark—­that was in his favour—­but it was not so dark but that a boat could be distinguished on the water for quite a distance, for a longer distance than he could hope to put between them.  There was no chance of eluding the police that way!  The keen, facile brain that had saved the Gray Seal a hundred times before was weaving, planning, discarding, eliminating, scheming a way out—­with death, ruin, disaster the price of failure.  His eyes swept the dim, irregular outline of the shore.  To his right, in the opposite direction from where he had left his car, and perhaps a mile ahead, as well as he could judge, the land seemed to run out into a point.  Jimmie Dale headed for it instantly.  If he could reach it with a little lead to the good, there was a chance!  It would take, say, six minutes, granting the boat a speed of ten miles an hour—­and she could do that.  The others could hardly overtake him in that time—­they hadn’t got started yet.  He could hear them still shouting and talking at the wharf.  And Mittel’s “twice as fast” was undoubtedly an exaggeration, anyhow.

A minute more passed, another—­and then, astern, Jimmie Dale caught the racket from the exhaust of a high-powered engine, and a white streak seemed to shoot out upon the surface of the water from where, obscured now, he placed the wharf.  A quarter-mile lead, roughly four hundred yards; yes, he had as much as that—­but that, too, was very little.