"D. Robertson."

In despatches of this sort important information regarding criminals is constantly flashing over the wires, with no danger of any "leak."

Thus, from one city to another, and through every part of the country, any criminal may be "shadowed" to-day as Schwartz was "shadowed," one set of detectives relieving another every twenty-four hours, and the man's every word and action be carefully noted down and reported, without his having the faintest suspicion that he is under observation. The task of "shadowing" a person who is traversing city streets is intrusted to men especially skilled in the art (for art it is) of seeing without being seen. This is, indeed, one of the most difficult tasks a detective is called upon to perform, and the few who excel in it are given little else to do. Where a criminal like Schwartz, upon whose final capture much depends, is being followed, two, three, or even four "shadows" are employed simultaneously, one keeping in advance, one in the rear, and two on either side. The advantage of this is that one relieves the other by change of position, thus lessening the chance of discovery, while, of course, it is scarcely possible for several "shadows" to be thrown off the trail at once. An adroit criminal might outwit one "shadow," but he could scarcely outwit four. A "shadow," on coming into a new town with a subject, reveals himself to the "shadow" who is to relieve him by some prearranged signal, like a handkerchief held in the left hand.

The result of the "shadowing" in Schwartz's case was conclusive. No sooner was the brakeman out of Chicago than he began spending money far in excess of his income. He bought fine furniture, expensive clothing, articles of jewelry, presents for his wife, and laid in an elaborate supply of rifles, shot-guns, revolvers, and all sorts of ammunition, including a quantity of cartridges. The "shadows" found that in almost every case he paid for his purchases with fifty-or one-hundred-dollar bills. As far as possible these bills were secured by the detectives from the persons to whom they had been paid, immediately after Schwartz's departure. It will be remembered that the money taken in the robbery consisted of fifty-and one-hundred-dollar bills.

IV

In addition to this, it was found, by the investigations of detectives at Philadelphia, that Schwartz was the son of a wealthy retired butcher there, a most respectable man, and that he had a wife and child in Philadelphia, whom he had entirely deserted. This gave an opportunity to take him into custody and still conceal from him that he was suspected of committing a higher crime. The Philadelphia wife and child were taken on to Chicago, and Schwartz was placed under arrest, charged with bigamy.

Mr. Pinkerton went to the jail at once, and, wishing to keep Schwartz's confidence as far as possible, assured him that this arrest was not his work at all, but that of detectives Smith and Murray, who were, as Schwartz knew, working in the interests of the railroad people and of the Chicago "Daily News." Mr. Pinkerton told Schwartz that he still believed, as he had done all along, that Watt was the guilty man, and promised to do whatever he could to befriend Schwartz. The latter did not appear to be very much alarmed, and said that a Philadelphia lawyer was coming on to defend him. The lawyer did come a few days later, when a bond for two thousand dollars was furnished for Schwartz's reappearance, and he was set at liberty. Matters had gone so far, however, that it was not considered safe to leave Schwartz out of jail, and he was immediately rearrested on the charge of murder.

Whether because of long preparation for this ordeal or because he was a man of strong character, Schwartz received this blow without the slightest show of emotion, and went back into the jail as coolly as he had come out. He merely requested that he might have an interview with his wife as soon as possible.

Mr. Pinkerton had evidence enough against Schwartz to furnish a strong presumption of guilt; but it was all circumstantial, and, besides, it did not involve Newton Watt, whose complicity was more than suspected. From the first Mr. Pinkerton had been carefully conciliatory of the later Mrs. Schwartz. At just the right moment, and by adroit management, he got her under his direction, and by taking a train with her to Morris, and then on the next morning taking another train back to Chicago, he succeeded in preventing her from getting the advice of her husband's lawyer, who was meantime making the same double journey on pursuing trains with the design of cautioning her against speaking to Mr. Pinkerton. She had come to regard Mr. Pinkerton more as a protector than as an enemy, and he, during the hours they were together, used every device to draw from her some damaging admission. He told her that the evidence against her husband, although serious in its character, was not, in his opinion, sufficient to establish his guilt. He told her of the bills found in Schwartz's possession, of the torn piece of the draft taken from the valise, of the marks on his hands and the lies he had told. All this, he said, proved that Schwartz had some connection with the robbery, but not that he had committed the murder, or done more than assist Watt, whom Mr. Pinkerton professed to regard as the chief criminal. The only hope of saving her husband now, he impressed upon her, was for her to make a plain statement of the truth, and trust that he would use this in her husband's interest.