Dense blackness fell. A shadow but little deeper than the darkness about him, Mike flitted across the room. He vanished, utterly without sound.
Then a faint scratching sound. The bound man was struggling to release himself, struggling with a terrible desperation and a horrifying futility. Mike, crouched down in a tiny book-closet, heard it. He was keyed up to an incredible pitch, every nerve quivering like a tightly strung wire. Mike was no longer intent upon robbery. One of the first rules of your old-time safe-cracker is to go through with a job only when everything is right. Mike was as suspicious of the unexpected as any wild animal. Just now his only desire was to get away — peacefully, if possible, but to get away.
He lay still. The scent of books and dust came to his nostrils, but he did not dare make a light to see. He smelled, too, that curious, rubbery smell of new electric insulation. There were wires in the closet somewhere, newly placed. Mike lay still.
Then he felt, rather than heard, someone enter the vault-room. There was a door between him and the newcomer, but he knew the instant that the other man entered. There was a moment of silence. Mike saw an infinitely faint glow through the keyhole. Someone was using a flash.
II
Frozen in utter stillness, Mike listened for the watchman’s exclamation of astonishment at sight of the bound man on the floor. Instead, he heard only a faint murmur. Then he caught words, faintly amused.
“Just got out, Jack, eh? I heard you fall. Out of luck, though. The watchman was in the other building. I saw him go in. He didn’t hear you.”
Then little noises as if the helpless man were being turned over — inspected to make sure the bonds were firmly in place. Then Mike felt that the last-come man was somewhat relieved.
“Don’t know how you got loose, Jack,” said the voice, as before kept lowered, “but you didn’t do any harm, anyhow. And the watchman won’t be back for an hour yet. I’ll be getting to work.”
There was a sound like a groan, as if the bound man were trying to make some sound or plea; but footsteps crossed lightly to the vault.
“Wondering, Jack, who I am, or did you recognize me?” The second man had stopped before the vault door. Mike heard an infinitely faint rustling, as of thin rubber being manipulated. He guessed at rubber gloves. “I think you must’ve recognized me when I slugged you. Anyway, since I asked you to wait a minute after office hours and then hit you with a sandbag, you must have guessed, while you’ve been waiting, that I was responsible for the matter.”
There was a little pause and a slight snapping sound, as if an elastic had been flicked into place.
“Yep, Jack, I’m Saunders, your boss. Don’t mind telling you, now, because you’re not going to split on me. I’m going to loot the same — clean, this time, and quit. By the way, Jack, I’m putting on rubber gloves, but, rather curiously, they’ll leave your finger-prints on the safe knob. You see, I’ve done this twice before. Once I got away with a lot of bullion and a few indifferent stones. That was a year and more ago and everyone’s grown careless since then. I managed to plant it so the watchman was suspected. He’s in jail now. And then, once, I fixed up the matter so that a theft of some finished stuff was discovered while I was on vacation. They never suspected me. But this time I’m going to clean out the works, all the bullion, all the stones, and tomorrow’s payroll.”
The unknown’s voice changed, and grew intent. Mike, in the dusty little closet, could hear a muted, musical tinkle, as he spun the combination knob.
“Got your finger-prints some time ago, Jack, when you knew nothing about it. I brought ’em out, photographed them, and contrived to fix them on the ends of these rubber gloves. I’ve run ’em through my hair, so they’ll be slightly oily, and they’ll convict you completely of opening the safe. I’ll have to use a microphone, myself, to hear the tumblers fall.”
Mike was listening with a curious mixture of fear and indignation and curiosity. He, himself, had a microphone apparatus in his pocket, which he had intended to use. The other man had beat him to it. Mike began to revolve a misty scheme for following the other man and taking his loot away. There was a clanking as of tiny bits of metal being fitted together.
“I rather think, Jack,” — the voice became amused, — “that you’re thinking of the trap that’s fixed for any man who breaks into the safe. Aren’t you?” — A moment of silence — “So that even if someone gets inside the vault, when he touches one of several things he’ll set off a switch, have the doors swing shut and lock on him, and ring a loud bell in police headquarters? I suggested that, Jack, and I was the one who was strong for the bell. I told ’em a burglar would be smothered in here in two hours, but with the doors closing fast on him to catch him, the police could get here, let him out and save his life, and catch him with the goods. But you forget there’s a switch to run that burglar-trap on.”
Mike, listening, found himself suddenly cold all over. If he had opened the huge vault, — as he was confident he could do, — he would never have thought of anything like that! He would have gone in, only anxious to secure his loot and depart before the watchman’s return. With luck, he would have been able, he thought, to get the big doors closed so his burglary would have gone unnoticed until morning. But when he went in, he would have touched one of a number of concealed springs. The huge doors would have swung to, relentlessly, upon him. He would have been trapped in an air-tight tomb, to batter futilely at the armor-plate barriers until the police came.
He was to get another shock.
“This afternoon, though,” said the soft voice outside, interrupted now and then by the infinitely faint musical sound of the spinning knobs, “I did a little work on that wiring. The doors will work, but the alarm won’t. The police will not be notified that a burglar is caught in the vault.”
Sweat came out, cold and clammy, on Mike’s skin. He would have been caught in there! He would have strangled! Hunched upon the floor of the smelly little book-closet, he shivered in uncontrollable terror from sheer horror at what he had escaped. Again he longed to get away from the factory, at any cost.
“Most through,” said the abstracted voice, outside. “Wonder why I’m telling you, Jack? You see, I need the stuff in there. Need it in my business. I’m going to take it, but I don’t want to have detectives chasing around to try to find the thief. With your fingerprints on the knob, they’d look for you, of course, but you might have proved an alibi to make ’em look farther. And also, Jack, you’re too damned fascinating. I was getting along pretty well with Ethel, until she met you. I want to get you out of the way. With you dead, she’ll marry me, sooner or later. I’m going to tap you on the head again, Jack, and put you in here. The doors will close on you. In the morning they’ll find that you opened the vault, passed out quite a lot of stuff to a confederate, and then by accident touched off the alarm that closes the doors. A sandbag doesn’t leave any sign, and I used straps to tie you up so there’ll be no marks on your wrists. I’ve thought of pretty nearly everything, Jack. I’ve even taken out all the pencils and fountain pens from your pockets. I’ve no notion of your writing an accusation of me while you’re in there; also I don’t want to kill you before you go in there. I want you to show the signs of dying from — er — the natural cause of being locked in an air-tight vault... Ah...”
There was a series of tiny clicks, then a faint creaking. Mike, in his hiding-place, with the smell of dust and books and new-placed rubber insulation in his nostrils, knew that the great doors had swung open.