“Fourteen thousand five hundred odd,” Billy Kane answered automatically.
“Quite so!” nodded the old millionaire. “Well, it’s worth it, isn’t it, Billy? I’ve never been afraid of any ordinary cracksman’s attempt against that vault; but, if I am right now, this wouldn’t be any ordinary attempt. I believe we are dealing with—brains. I believe, further, that instead of you and I being the only ones who know the combinations, as we have imagined, they are known to someone else. Suppose, then, that the vault is found empty some morning? I immediately recall to mind that letter. I remember that you are the only one to whom I have confided the combinations. And suppose that some additional clue pointing to you is left on the scene of the robbery? It would look pretty black for you, Billy, would it not? Naturally the stolen stones and money would not be found in your possession; but the plain, logical supposition would be that, not being a fool, and believing that you were above suspicion, you had secreted the proceeds of the robbery, and were pursuing what you considered the safest course—that is, to brazen it out and indignantly proclaim your innocence. The object of all this, of course, being immunity for the real authors of the crime, for if you were accused and convicted it is obvious that the police would look no further and consider the case closed.”
Billy Kane did not reply for a moment. He had been startled at first, but now he was conscious rather of a slight sense of inward amusement. The old millionaire’s deductions were, of course, plausible and possible; but, also, they appeared to be a little labored, a little far-fetched, a little visionary. Apart from being based on a premise that entailed somewhat elaborate preparations, there was one very weak point in the old gentleman’s argument. The combinations being known only to the two of them, David Ellsworth had failed to explain how, or where the combinations had been obtained by a third party; and Billy Kane was even more than ever confirmed in his mind that there was a very much simpler, and a very much more creditable motive for that letter—spite. Through his efforts there was more than one none too reputable a character who otherwise would have partaken liberally of the old philanthropist’s bounty; and that was probably the secret of the letter. That the day’s cogitations of David Ellsworth had resulted in the discovery of a mare’s nest was the way it struck Billy Kane now; but if the old gentleman found satisfaction in his deductions, he, Billy Kane, was of no mind to dispute them. There was nothing to be gained by it, and on occasions he had known even David Ellsworth to grow stubborn and most unpleasantly irascible.
“You may be right, sir,” Billy Kane said deliberately.
David Ellsworth’s two hands fell on Billy Kane’s shoulders, and pressed him back into his chair again.
“So you think I may be right, do you?” There was a twinkle in the blue eyes. “Tut, tut! You can’t fool the old man, Billy, my boy! What you really think is that I’ve got a brain storm. But”—his voice grew suddenly grave and agitated—“I know I’m right, Billy—I feel it. I’m as sure now, as though it had already happened. But we’ll beat them, my boy! Take your pen, and a blank card—there are some in the top drawer there. Being forewarned, all that’s necessary is to change the combinations. And I guess that will be an answer to their letter that they didn’t expect!”
David Ellsworth was already across the room. Billy Kane took a small blank card from the drawer of the desk, picked up a pen, and, without comment, turned in his chair to watch the other. After all, little as he shared the old millionaire’s alarm, the changing of the vault’s combination was a precaution well worth while under any circumstances. If it even became a habit, so much the better!
The portières were swung back now, the innocent looking door that matched the others in the room was opened, and the nickel-plated knobs and dials of the massive steel inner door glistened in the light. Came a faint musical tinkle, as the dial whirred under David Ellsworth’s fingers; then, presently, a soft metallic thud, as the old millionaire swung the handle over and the bolts shot back. The heavy door moved slightly inward, there was the click of an electric-light switch, the vault was flooded with light, and from where he sat Billy Kane could see into the interior. It was as large as a small sized room, and built of the finest steel throughout. Steel shelves piled with document cases lined the vault, and at the far end was a huge safe of the most modern and perfected design. Billy Kane smiled a little to himself. In one thing, at least, that David Ellsworth had said, the old millionaire had indubitably been justified. The vault was as impregnable as human ingenuity and skill could make it, and there was very little indeed to be feared from any ordinary attempt upon it.
A few minutes passed while David Ellsworth worked with the key used for changing the combination and with the mechanism on the inner side of the door, and then he began to call out a series of numbers. Billy Kane jotted them down on the card.
“We’ll test it now—call them back,” said David Ellsworth; and then, as Billy Kane obeyed: “All right, Billy. Now we’ll do the same thing with the safe.”