Henry was about to ask Captain Hardy what he meant by saying that they were sugar refiners, but when he saw the motor-cycle that awaited him he forgot his question and gave a sharp cry of exultation. It was a beautiful machine, with tires so strong and thick they were practically puncture proof and were evidently equal to any demand that was likely to be made upon them. Evidently the engine was one of great power. The frame of the machine was a dark gray; and Henry instantly noted the fact that there was an almost utter absence of nickel about the motorcycle. The spokes, handle-bars, and trimmings were all enameled black. The headlight was a powerful electric one, with a black cap over the lens. With great interest Henry examined the spark- and gasoline-controls, the motor itself, and finally the muffler, which was of the most improved variety. He looked in the gasoline-tank and found it full. The oil-tank was brimming. Every moving part had been carefully greased and cleaned.
"What's this?" cried Henry, of a sudden, noting what seemed to be an extra and unnecessary piece of framework.
"Take it out and see," said Captain Hardy, with a smile.
Carefully Henry examined the fastenings, to see how the extra tubing was adjusted. Then he drew it forth.
"A metal cane," he said, puzzled. "What is it? What is it for?"
Captain Hardy explained. Then he picked up a small electric torch, some well insulated wires that lay coiled on a near-by chair, and something that looked like a giant fountain pen. He handed these articles to Henry, and repeated what the secret service man had told him as to their use.
"Put them in your pocket and be very careful that you do not lose them," directed Captain Hardy. "Carry them with you so that you can run to your motor-cycle at a second's notice. Now replace that cane on the machine."
Henry slid the cane back and fastened it in place. It was gray, like the car, and seemed to be a part of it. Then Captain Hardy fastened the little map case above the gasoline-tank in such a way that Henry could pluck out a map as he rode.
"Now," he said, "there is nothing to do but wait until the automobile driver comes for another dollar. Then you must follow him wherever he goes. You must watch every movement he makes. But you must not let him see you. It's a hard thing to ask of you, Henry, for everything hinges upon your success."
A look of determination flashed in Henry's eyes. "I'll do my best," he said simply.