The Submarine Hunters

He opened the window in front of him. Hawke was sitting with the chauffeur. Quickly the detectives arrived at their decision.

"After that chap!" exclaimed Hawke, addressing the chauffeur; "that motor-cyclist who has just passed. Ten pounds if you overhaul and stop him."

It was the bright moonlight that had tempted Ramblethorne to go for a midnight ride. He was a keen out-of-door man. He could handle almost any make of car or motor-cycle with the utmost skill. Finding himself at Shrewsbury, he hired a motor-cycle from an agent, intending to have a run along the road following the banks of the Severn as far as Ironbridge. It was his practice, whenever in a strange place, speedily to become conversant with the locality. It was, in fact, part of his training as a spy.

Ramblethorne was somewhat taken aback when he saw Ross's face in the moonlight, although he betrayed no sign of surprise. In an instant he realized that, by some means, young Trefusis had escaped from U75; more, he was with a party of men evidently hard on his track.

Quickly he made up his mind. His career as a medical officer to the British Service was ended. He could no longer hope to serve the German Government in that direction. Before morning a hue and cry would be raised.

As he swung along the broad, level road he thought out his plans. He would ride as hard as he could until his supply of petrol gave out—a matter of about seventy or eighty miles. Then he would abandon and hide the motor-cycle, and make his way on foot to the Essex coast. There, he had means to get on board a nominally British fishing-boat, which would run him over to a Dutch port.

Although the motor-cycle was travelling at close on forty miles an hour, Ramblethorne glanced back over his shoulder. He hardly expected to be pursued. If the car had turned to attempt to overhaul him, it would almost to a certainty take the wider of the two fork roads—that leading to Wellington.

Disagreeably surprised, the spy saw the two powerful head-lights of the car less than a mile behind him.

The chauffeur of the pursuing vehicle had set his heart on winning the promised guerdon. "All out" the car bounded along the road, leaving in its trail a dense cloud of dust that slowly dispersed in the moon-lit air.

Hanging on desperately to the sides of the swaying car, Ferret and the two lads knelt upon the front seat of the coupe and peered through the dust-flecked glass at the solitary motor-cyclist in front. They were gaining—rapidly at first, but now the gap between lessened almost imperceptibly.

At that tremendous rate, the bursting of a tyre would result in complete disaster, yet not one thought did the pursuers give to the danger they were running. Their sole attention was centred upon the spy.

A sharp bend close to the village of Cressage enabled the car to get within fifty yards of the motor-cyclist. Hawke drew a revolver from his pocket. The chauffeur noticed the action out of the corner of his eye. Purposely he toyed with the sensitive steering-wheel, causing the car to swerve erratically.

"Put it up, sir!" he exclaimed, shouting in order to make himself heard above the roar of the wind over the screen. "If you bring him down we'll smash up on top of him before we can pull up. We'll have him on Harley Bank right enough."

A sharp run down through the village of Harley brought the car within sight of a very steep hill, up which the road wound like a silver thread against the black slope. This was Harley Bank, one of the steepest of many stiff Shropshire hills, its gradient averaging one in seven.

Up mounted the motor-cycle. Ramblethorne was attempting to take it on high gear.

The chauffeur of the car took no risks. He promptly dropped into second gear, with the result that the gap between them increased to nearly a hundred yards. Then the motor-cycle began to falter. Perhaps Ramblethorne was not thoroughly acquainted with the mechanism of the two-speed. By the time he got the friction-clutch into action the car had more than regained the lost distance—and the fugitive had not yet reached the stiffest part of the hill.

"Head him off—jam him up against that bank!" ordered Hawke.

"What for, sir?" asked the chauffeur. He had no objection to taking part in a midnight chase, but his sense of prudence told him that it was not advisable to deliberately smash up another vehicle.

"He's a spy," replied Hawke. "Don't hesitate. I will take all risks."

Fifteen seconds later the near front wheel of the car was abreast of Ramblethorne's back wheel. Hawke leant sideways with the intention of gripping the motor-cyclist by the collar, since the relative speeds were practically the same. At the same moment the car edged a little closer to the left-hand side of the road.

Ramblethorne realized the danger. A collision would with almost certainty result in his receiving a broken neck; capture meant ignominious death at the hands of a firing-party. There was yet a third alternative—a dash for safety.