CHAPTER XIX.
AN UNTIMELY KNOCK.Despite the opening of the door, the interior of the safe did not meet Gordon’s eye, as he naturally had anticipated. Instead, he found himself confronted by a second door.
Worse still, this second door appeared to be even more formidable than the first.
Doubtless, it was not nearly so thick, of course, but the trouble was that it presented an absolutely unbroken surface. In other words, there was no knob on it, no combination, no handle, nothing to indicate how it opened, or where the lock was.
It might open from left to right, or right to left—or from top to bottom, or bottom to top, for that matter. Moreover, it was only after a close and most careful scrutiny that it was possible for Green Eye to tell where the door ended, and the rest of the safe beg
