Henry, meantime, impatient, like Paul Revere, "to mount and ride," stood peering out of a tiny window of the garage, awaiting the expected motor-car. In his eagerness minutes seemed like hours. As time passed and no motorcar came, he began to believe that none would come, that the spies had learned of the trap set for them, and that they had discontinued their work or devised some new plan of operation. So impatient did Henry become that he could hardly refrain from running into the street to see if any motor-cars were approaching. At last his anxiety was relieved. He heard the regular beating of a motor climbing the hill. Then as he glued his eye to the tiny window the familiar car, a powerful roadster, with its top raised, rolled by. Again Henry tried to catch the number and failed. Then he knew that the dust-covered license number was not dust covered by accident. Quickly he noted the treads of the tires, and the shape of the wheel hubs, axles, and springs, so that he could identify the car. Then it passed from his sight.
And now his anxiety suddenly grew a hundredfold. Always before, the car had returned the way it came. Suppose that this time it should go back by another route and he should miss it. He could not endure the thought. Quickly he opened the door and peered forth. The driver was just turning his car, as he had always done before. The matter was settled. He would pass Henry's hiding place on his return. Quickly Henry shut the door and waited with what patience he could command.
for what seemed like an hour he waited. His pulse beat fast with excitement. He could hardly compel himself to stand quietly by his window and wait. The old fear that the motorist had gone away by some other route returned and began to torture him. He wanted to run out into the street and assure himself that the car was still in sight. And then, when it seemed he could endure the suspense not a second longer, he heard the purring of a motor, and the car he was waiting for slid quietly by and began to descend the hill toward the ferry.
At once a new fear sprang up in Henry's heart. Suppose the motor-cycle wouldn't go. Suppose he should be so slow as to miss the ferry-boat. Desperately he flung open the door and trundled his motor-cycle out to the street. The roadster was only a block ahead of him. Speedily Henry pushed the cycle along the road. The motor began to bark and Henry leaped to the saddle. In another instant he was speeding after the roadster and was already so near it that he had to jam on his brake to avoid coming up to it. Near the ferry there was more traffic and Henry felt relieved. He dropped back a little distance and was almost completely hidden from the roadster by the carts and cars between them. So they proceeded to the ferry, the suspected driver bringing his roadster to a halt near the front of the ferry-boat just as Henry, following a string of wagons and carts, reached the other end of the craft. Then the whistle blew and the boat pulled out into the Bay.
But Henry had now no eyes for the sights in the harbor that had formerly so fascinated him. His entire attention was centred on the roadster. The driver of the roadster remained in his seat, calmly looking out over the Bay. Henry stood his machine against a post and sought a position near by where he was sheltered from the spy's observation by a huge coal truck, but where he could himself distinctly see the roadster by peering through the spokes of the truck wheels. Again he made a mental inventory of the distinguishing features of the car he was following. And before the ferry-boat reached Manhattan he could have passed a perfect examination as to the appearance of the roadster.
It was already dusk when the boat slid into its slip, and the heavy clouds overhead gave promise of a dark night. Henry was thankful. Up Broadway he followed the roadster at a safe distance, then up Park Row, and so to the Brooklyn Bridge. Across this magic structure, one hundred and fifty feet above the surface of the water, Henry continued to follow the roadster. The great buildings, piled skyward in huge masses, were twinkling with a million lights. Boats were coming and going on the stream below. Electric cars followed one another across the bridge in endless procession. Elevated railway trains thundered past unceasingly. Up-stream shone the fairy lights of the other bridges that span the East River. The Navy Yard lay in full view. But the scene that at other times Henry would have found entrancing, now he scarcely noticed. He had eyes for one thing only—the rolling motor-car ahead of him and the red eye that now glowed at its rear.
He turned on his light and at a safe distance followed the roadster, which was heading due east. They passed the business portions of Brooklyn. They left Prospect Park behind them. They traversed a region of apartment-houses. Then came less thickly settled districts, with block after block of private residences, each in its own little yard. And so they proceeded to the very outskirts of the city, where houses gave place to vacant lots and vacant lots were succeeded by open fields. Darkness had come. Traffic had grown less and less. Now there were no sheltering vehicles between himself and the roadster. A great fear of discovery sprang up in Henry's heart. He switched off his light, risking arrest, and rode on in the darkness. Occasionally he passed under a lone street lamp. And now he understood why his machine was enameled black instead of being nickel finished. It gave back no answering gleam when beams of light fell upon it. It was made for just the secret sort of work it was doing now. For, with his motor completely muffled, his lamp extinguished, Henry was now riding through the night like a dark shadow.
Long before this, Henry had slipped the proper map from its case and had followed his route as far as he was able to see. Though his eyes could no longer pierce the darkness, Henry knew that he was passing through a lonely, undeveloped section of land. Dimly he glimpsed tiny bits of woodland here and there. The lonely lights Henry occasionally saw were the lamps in isolated farmhouses. He could no longer tell exactly where he was, though he knew the road he was following. But he had watched his speedometer closely and he knew he was traveling about twenty miles an hour. He was keeping pace with the motor-car, but riding several hundred yards behind it. So they continued for a long time.
Suddenly the motor-car swung round a curve and vanished from sight. Henry knew the car had rounded a curve because he saw the lights swing. A minute later as he was about to reach the curve himself, he heard the rapid beating of hoofs and a team of horses came tearing round the bend and charged straight at him. Evidently the driver had lost control of them and it flashed into Henry's mind that they had been frightened by the roadster ahead. But he had no time to think of anything. The frantic animals bore down on him like an express-train. Quick as thought Henry turned sharply to the right and threw on his power. The horses were almost upon him. The driver glimpsed him, cursed him savagely for having no light, and gave a powerful heave on the reins. The horses swerved in one direction as Henry shot in the other, missing them by less than a foot. Before he could straighten his machine again, it had left the road and was plunging over the rough surface of a field.
Henry jammed his brake on so suddenly that it toppled him from the saddle, but neither he nor the machine was injured. He turned the motor-cycle about and headed for the road. And now his hair almost stood on end. In the darkness he could dimly see some great lumber piles, as large as houses. He had all but crashed into them at high speed. Now he understood why the roadster's light had disappeared when the car turned the curve. It had been hidden by these great lumber piles. Rapidly Henry ran back to the road. He knew the motor-car would now be far ahead of him. He should have to hasten to overtake it. He ran along the highway, pushing his machine, and leaped to the saddle when the engine began to explode regularly. Then he turned the curve and peered ahead into the darkness. The road seemed to lie straight before him, but the motor-car had utterly vanished.