As the old book-keeper saw them he started up, and made as if to leave the office.

"Keep your seat, Major," cried Mr. Wheatcroft, sternly, but not unkindly. "Keep your seat, please."

Then he turned to Mr. Whittier. "I have something to tell you both,"

he said, "and I want the Major here while I tell you. Paul, may I trouble you to see that the door is closed so that we are out of hearing?"

"Certainly," Paul responded, as he closed the door.

"Well, Wheatcroft," Mr. Whittier said, "what is all this mystery of yours now?"

The junior partner swung around in his chair and faced Mr. Whittier.

"My mystery?" he cried. "It's the mystery that puzzled us all, and I've solved it."

"What do you mean?" asked the senior partner.

"What I mean is, that somebody has been opening that safe there in the corner, and reading our private letter-book, and finding out what we were bidding on important contracts. What I mean is, that this man has taken this information, filched from us, and sold it to our compet.i.tors, who were not too scrupulous to buy stolen goods!"

"We all suspected this, as you know," the elder Whittier said; "have you anything new to add to it now?"

"Haven't I?" returned Mr. Wheatcroft. "I've found the man! That's all!"

"You, too?" e.j.a.c.u.l.a.t.ed Paul.

"Who is he?" asked the senior partner.

"Wait a minute," Mr. Wheatcroft begged. "Don't be in a hurry and I'll tell you. Yesterday afternoon, I don't know what possessed me, but I felt drawn down-town for some reason. I wanted to see if anything was going on down here. I knew we had made that bid Sat.u.r.day, and I wondered if anybody would try to get it on Sunday. So I came down about four o'clock, and I saw a man sneak out of the front door of this office. I followed him as swiftly as I could and as quietly, for I didn't want to give the alarm until I knew more. The man did not see me as he turned to go up the steps of the elevated railroad station. At the corner I saw his face."

"Did you recognize him?" asked Mr. Whittier.

"Yes," was the answer. "And he did not see me. There were tears rolling down his cheeks, perhaps that's the reason. This morning I called him in here, and he has finally confessed the whole thing."

"Who--who is it?" asked Mr. Whittier, dreading to look at the old book-keeper, who had been in the employ of the firm for thirty years and more.

"It is Major Van Zandt!" Mr. Wheatcroft declared.

There was a moment of silence; then the voice of Paul Whittier was heard, saying, "I think there is some mistake!"

"A mistake!" cried Mr. Wheatcroft. "What kind of a mistake?"

"A mistake as to the guilty man," responded Paul.

"Do you mean that the Major isn't guilty?" asked Mr. Wheatcroft.

"That's what I mean," Paul returned.

"But he has confessed," Mr. Wheatcroft retorted.

"I can't help that," was the response. "He isn't the man who opened that safe yesterday afternoon at half-past three and took out the letter-book."

The old book-keeper looked at the young man in frightened amazement.

"I have confessed it," he said, piteously--"I have confessed it."

"I know you have, Major," Paul declared, not unkindly. "And I don't know why you have, for you were not the man."

"And if the man who confesses is not the man who did it, who is?" asked Wheatcroft, sarcastically.

"I don't know who is, although I have my suspicions," said Paul; "but I have his photograph--taken in the act!"

V

When Paul Whittier said he had a photograph of the mysterious enemy of the Ramapo Steel and Iron Works in the very act of opening the safe, Mr. Whittier and Mr. Wheatcroft looked at each other in amazement.

Major Van Zandt stared at the young man with fear and shame struggling together in his face.

Without waiting to enjoy his triumph, Paul put his hand in his pocket and took out two squares of bluish paper.

"There," he said, as he handed one to his father, "there is a blue print of the man taken in this office at ten minutes past three yesterday afternoon, just as he was about to open the safe in the corner. You see he is kneeling with his hand on the lock, but apparently just then something alarmed him and he cast a hasty glance over his shoulder. At that second the photograph was taken, and so we have a full-face portrait of the man."

Mr. Whittier had looked at the photograph, and he now pa.s.sed it to the impatient hand of the junior partner.

"You see, Mr. Wheatcroft," Paul continued, "that although the face in the photograph bears a certain family likeness to Major Van Zandt's, all the same that is not a portrait of the Major. The man who was here yesterday was a young man, a man young enough to be the Major's son!"

The old book-keeper looked at the speaker.

"Mr. Paul," he began, "you won't be hard on the----" then he paused abruptly.

"I confess I don't understand this at all!" declared Mr. Wheatcroft, irascibly.

"I am afraid that I do understand it," Mr. Whittier said, with a glance of compa.s.sion at the Major.

"There," Paul continued, handing his father a second azure square, "there is a photograph taken here ten minutes after the first, at 3.20 yesterday afternoon. That shows the safe open and the young man standing before it with the private letter-book in his hand. As his head is bent over the pages of the book, the view of the face is not so good. But there can be no doubt that it is the same man. You see that, don't you, Mr. Wheatcroft?"

"I see that, of course," returned Mr. Wheatcroft, forcibly. "What I don't see is why the Major here should confess if he isn't guilty!"

"I think I know the reason for that," said Mr. Whittier, gently.

"There haven't been two men at our books, have there?" asked Mr.

Wheatcroft--"the Major, and also the fellow who has been photographed?"

Mr. Whittier looked at the book-keeper for a moment.

"Major," he said, with compa.s.sion in his voice, "you won't tell me that it was you who sold our secrets to our rivals? And you might confess it again and again, I should never believe it. I know you better. I have known you too long to believe any charge against your honesty, even if you bring it yourself. The real culprit, the man who is photographed here, is your son, isn't he? There is no use in your trying to conceal the truth now, and there is no need to attempt it, because we shall be lenient with him for your sake, Major."

There was a moment's silence, broken by Wheatcroft suddenly saying:

"The Major's son? Why, he's dead, isn't he? He was shot in a brawl after a spree somewhere out West two or three years ago--at least, that's what I understood at the time."