"Slim! He hates me for making him, but he'll do what he can. He'll tell the Harlem police and the towns along the Hudson that he's got you.

He'll try to cover himself with a planted getaway. You have an automobile. Take it and leave by the Broadway bridge. You'll catch the Montreal express at Tarrytown. You've plenty of time, and everything will be arranged; but he can't keep the wool over the district attorney's eyes forever. If you're not over the border to-morrow morning it's no good. So catch that train."

"Come here, Nora," Slim sighed, "and let me thank you properly."

Her laugh was hard, more suggestive of forbidden tears than mirth.

"One hostage is enough. And, Jim, there's a condition for you. Father won't budge unless you give him your word to go quietly. You have to promise on your sacred oath not to make any effort to escape or to throw Slim down."

"What's that for?" George asked suspiciously.

Her tone was contemptuous.

"Use your head, George. It would do father a lot of good to risk so much for Jim if he took matters into his own hands and got the acid just the same."

"Right!" Slim agreed. "You've plenty of common-sense, Nora, and it's going to give us a chance."

"You promise, Jim?"

He fancied an element of command in her voice.

"I'll do what you wish, Nora," he answered. "I promise."

"Then good-by," she called, and her voice no longer held any command, nor was it steady. "Good-by. If I only dared come over to you! G.o.d bring you back safe to me."

Garth tried to fight back the response of his heart. He told himself that honorably he must accept all she had said that night as mimicry whose only intention was to save his life. She would expect him to take it at its real value, but he could not shake off the recollection of her emotion. With a great longing he watched her move into the shadows beyond the door.

CHAPTER XXI

THE ANTICS OF A TRAIN

At a gesture from Slim, George cut the cords that bound Garth's ankles.

The detective rose. With a nod Slim motioned George towards the oak door which opened on Marlowe's cellar.

"Get to the 'phone," he whispered. "Pa.s.s the fair word, and bring the wheels here on the minute."

He swung on the detective.

"If you see anybody upstairs, just keep your back turned so they won't notice your pretty bracelets."

Garth shivered, aware that a new and disquieting element had entered the situation.

Slim indicated the revolver, held ready in his coat pocket.

"After George, and in front of me. Always like that from now on."

He touched the bottle of acid which he had taken from George.

"Remember this will be behind you like my gun, but I don't want to shoot to kill with either. Just a little in the face is better if you try to cut up."

"You heard my promise," Garth said.

He followed George through the doorway, resisting continually the impulse to turn around, to a.s.sure himself of what he already knew, that Slim was actually alert each moment to discipline his slightest effort at escape.

They crossed the damp s.p.a.ces of the cellar and climbed the stairs, pausing at the head until they could be certain Marlowe's evil figure still faced a bar-room, significantly empty.

George hurried to the telephone booth, fastening the door behind him so that Garth could hear nothing. Marlowe wiped his hands on his ap.r.o.n. A sly smile twitched at the corners of his colorless lips.

"Well! Well! Who's rented the warehouse? Who are your pals, Mr. Garth?"

Garth kept his back turned. The gla.s.ses tinkled musically under Marlowe's nervous fingers.

"Maybe you'll name your pleasure, gentlemen."

"Nothing but a little quiet," Slim grunted.

Marlowe flung up his hands, indicating a profound disapproval.

"Then what you mean coming through my cellar? That might get me in bad with the cops. Or maybe you're detectives like Mr. Garth?"

Slim responded to the strain of this waiting. He turned angrily on the man.

"How often have I told you, Papa Marlowe, to keep your fat mouth shut?"

For Garth that outburst pitilessly defined the new element. Slim's anger had let slip real evidence of the proprietor's lawless connection with the gang; and Slim, Garth knew, was unlikely to make blunders he couldn't retrieve. This one dovetailed into the fact that the detective could still identify the four confederates he had seen down stairs--that is, if he kept his eyes. Slim, then, had no intention of holding to his bargain with Nora. He would use Garth as far as the border, then he would protect his own through the unspeakable punishment his twisted soul craved. Nor could Garth see any way to save himself. Moreover, he knew Nora too well to cast lightly aside the promise she had drawn from him on a note of command.

George emerged from the booth. The four men stared at each other without words. Once or twice Marlowe started to speak, but at a frown from Slim he smothered the impulse in a busy attention to his bar cloth.

Faintly the whirring of a motor reached them. George sprang for the door. Slim motioned Garth ahead and followed him to the sidewalk where an automobile had drawn up. It exposed, in the vague light, an air of smug respectability in itself protective.

The driver wore a fur coat with a voluminous cape, of a common chauffeur pattern. Its collar was turned up so that it completely hid the lower part of the wearer's face. Garth didn't understand at first when Slim took a smaller coat from the car, stooped, and whispered in the driver's ear. The other stepped obediently to the sidewalk, removed his great coat, handed it to Slim, and slipped on the smaller one. Slim motioned George and Garth into the car, followed them, and, while he jerked out his instructions, drew down the side curtains. Garth was to sit on the back seat with George, who would keep one hand conveniently on his automatic. Slim would be opposite, his gun handy, and the bottle of acid ready at his side.

"And that isn't all," he leered. "You're too precious to take chances with. Here! Lean forward."

He flung the chauffeur's great coat across Garth's shoulders, and, over his chained wrists, b.u.t.toned it tight about him. He chuckled as the car started.

"The cape, George, makes it look as if our friend kept his hands out of sight for warmth. Let's hope the train'll be a little chilly, too. Your arms are going to sleep and get a nice rest, Garth."

He chuckled again. He took his own handkerchief and borrowed George's.

With the two he improvised a gag which he fastened skillfully in the prisoner's mouth. Then he turned the great collar up so that the gag was hidden.

"You've a swell chance to make trouble now, Garth. That's how I check up on a bull's promises. If anybody tries to stop us or to snitch you free you'll get the acid in those shining peepers without being able to move.

You'd better pray everybody keeps straight."

Enough light entered from the front to draw an ashen glow from the acid which he held at his side perpetually ready.