It was worded cryptically:

A. A. L. N. Y.

Closely watched. Must act soon or all will be discovered.--M.

Smith read the note, nodded, and put it into his pocket, as he started to the door.

"No, no," shouted Del Mar, calling him back. "This thing means that you'll have to be careful in your getaway. You'd better go out through my secret pa.s.sage," he added, pointing to the panel in the library wall.

He pressed the b.u.t.ton on the desk and Smith left through the hidden pa.s.sage. Down it he groped and at the other end emerged. Seeing no one around, he made his way to the road. There seemed to be no one who looked at all suspicious on the road, either, and Smith congratulated himself on his easy escape.

On a bridge over a creek, however, as Smith approached, was one inoffensive-looking person who might have been a minister or a professor. He was leaning on the rail in deep thought, gazing at the creek that ran beneath him, and now and then flashing a sharp glance about.

Suddenly he saw something approaching. Instantly he dodged to the farther end of the bridge and took refuge behind a tree. Smith walked on over the bridge, oblivious to the fact that he was watched. No sooner had he disappeared than the inquisitive stranger emerged again from behind the tree.

It was the mysterious Professor Arnold who many times had shown a peculiar interest in the welfare of Elaine and myself.

Evidently he had recognized Del Mar's messenger, for after watching him a moment he turned and followed.

At the railroad station, just before the train for New York pulled in, the waiting crowd was increased by one stranger. Smith had come in and taken his place unostentatiously among them.

But if he thought he was to be lost in the little crowd, he was much mistaken. Arnold had followed, but not so quickly that he had not had time to pick up the two policemen that the town boasted, both of whom were down at the station at the time.

"There he is," indicated Arnold, "the fellow with the slight limp.

Bring him to my room in the St. Germain Hotel."

"All right, sir," replied the officers, edging their way to the platform as Arnold retreated back of the station and disappeared up the street.

Just then the train pulled into the station and the pa.s.sengers crowded forward to mount the steps. Smith was just about to push his way on with them, when the officers elbowed through the crowd.

"You're wanted," hissed one of them, seizing his shoulder.

But Smith, in spite of his deformity, was not one to submit to arrest without a struggle. He fought them off and broke away, running toward the baggage-room.

As he rushed in, they followed. One of them was gaining on him and took a flying football tackle. The other almost fell over the twisted ma.s.s of arms and legs. The struggle now was short and sharp and ended in the officers slipping the bracelets over the wrists of Smith. While the pa.s.sengers and bystanders crowded about to watch the excitement, they led him off quickly.

In his rooms at the St. Germain, cluttered with test tubes and other paraphernalia which indicated his scientific tendencies, Professor Arnold entered and threw off his hat, lighting a cigarette and waiting impatiently.

He had not as long to wait as he had expected. A knock sounded at the door and he opened it. There was Smith handcuffed and forced in by the two policemen.

"Good work," commended Arnold, at once setting to work to search the prisoner who fumed but could not resist.

"What have we here?" drawled Arnold in mock courtesy and surprise as he found and drew forth from Smith's pocket a bundle of papers, which he hastily ran through.

"Ah!" he muttered, coming to Del Mar's note, which he opened and read.

"What's this? 'A. A. L. N. Y. Closely watched. Must act soon or all will be discovered. M.' Now, what's all that?"

Arnold pondered the text deeply. "You may take him away, now," he concluded, glancing up from the note to the officers. "Thank you."

"All right, sir," they returned, prodding Smith along out.

Still studying the note, Arnold sat down at the desk. Thoughtfully he picked up a pencil. Under the letters A. A. L. he slowly wrote "Anti-American League" and under the initial M the name, "Martin."

"Now is the time, if ever, to use that new telaphotograph instrument which I have installed for the War Department in Washington and carry around with me," he said to himself, rising and going to a closet.

He took out a large instrument composed of innumerable coils and a queer battery of selenium cells. It was the receiver of the new instrument by which a photograph could be sent over a telegraph wire.

Down-stairs, in the telegraph room of the hotel, Arnold secured the services of one of the operators. Evidently by the way they obeyed him they had received orders from the company regarding him, and knew him well there.

"I wish you'd send this message right away to Washington," he said, handing in a blank he had already written.

The clerk checked it over:

U. S. WAR DEPARTMENT, Washington, D. C.

Wire me immediately photograph and personal history of Martin arrested two years ago as head of Anti-American League.--ARNOLD.

As the message was ticked off, Arnold attached his receiving telaphotograph instrument to another wire.

It was a matter scarcely of seconds before a message was flashed back to Arnold from Washington:

Martin escaped from Fort Leavenworth six months ago. Thought to be in Europe. Photograph follows.

EDWARDS.

"Very well," nodded Arnold with satisfaction. "I think I know what is going on here now. Let us wait for the photograph."

He went over to the new selenium telaphotograph and began adjusting it.

Far away, in Washington, in a room in the War Department where Arnold had already installed his system for the secret government service, a clerk was also working over the sending part of the apparatus.

No sooner had the clerk finished his preparations and placed a photograph in the transmitter than the buzzing of the receiver which Arnold had installed announced to him that the marvellous transmission of a picture over a wire, one of the very newest triumphs of science, was in progress. In the little telegraph office of the St. Germain, the clerks and operators crowded about Arnold, watching breathlessly.

"By Jove, it works!" cried one, no longer sceptical.

Slowly a print was being evolved before their eyes as if by a spirit hand. Arnold watched the synchronizer apparatus carefully as, point after point, the picture developed. He bent over closely, his attention devoted to every part of the complicated apparatus.

At last the transmission of the photograph was completed and the machine came to rest. Arnold almost tore the print from the receiver and held it up to examine it.

A smile of intense satisfaction crossed his face.

"At last!" he muttered.

There was a photograph of the man who had been identified with the arch conspirators of two years before, Martin. Only, now he had changed his name and appeared in a new role.

It was Marcus Del Mar!