"We couldn't get a search-warrant, could we?"

"We have found nothing, so far, in that cipher letter to encourage us in applying for any such warrant," he said cruelly.

"Wouldn't the excuse that Lauffer is an enemy alien and not registered aid us in securing a warrant?" she insisted.

"He is not an alien. I investigated that after you left this afternoon. His parents were German but he was born in Chicago.

However, he is a Hun, all right--I don't doubt that.... What do you propose to do now?"

She looked at him appealingly:

"Won't you allow me more than twenty-four hours?"

"I'm sorry."

"Why won't you?"

"Because I can't dawdle over this affair."

The girl smiled at him in her attractive, resolute way:

"Unless we find that book we can't decipher this letter. The letter comes from Mexico,--from that German-infested Republic. It is written to a man of German parentage and it is written in cipher.

The names of Luxburg, Caillaux, Bolo, Bernstorff are still fresh in our minds. Every day brings us word of some new attempt at sabotage in the United States. Isn't there ANY way, Mr. Vaux, for us to secure the key to this cipher letter?"

"Not unless we go up and knock this man Lauffer on the head. Do you want to try it?"

"Couldn't we knock rather gently on his head?"

Vaux stifled a laugh. The girl was so pretty, the risk so tremendous, the entire proceeding so utterly outrageous that a delightful sense of exhilaration possessed him.

"Where's that gun?" he said.

She drew it out and handed it to him.

"Is it loaded?"

"Yes."

"Where are the handcuffs?"

She fished out the nickel-plated bracelets and he pocketed his torch. A pleasant thrill pa.s.sed through the rather ethereal anatomy of Mr. Vaux.

"All right," he said briskly. "Here's hoping for adjoining cells!"

To jimmy the gla.s.s door was the swiftly cautious work of a moment or two. Then the dark stairs rose in front of them and Vaux took the lead. It was as cold as the pole in there, but Vaux's blood was racing now. And alas! the photograph of Arethusa was in his desk at the office!

On the third floor he flashed his torch through an empty corridor and played it smartly over every closed door. On the fourth floor he took his torch in his left hand, his pistol in his right.

"The door to the apartment is open!" she whispered.

It was. A lamp on a table inside was still burning. They had a glimpse of a cheap carpet on the floor, cheap and gaudy furniture.

Vaux extinguished and pocketed his torch, then, pistol lifted, he stepped noiselessly into the front room.

It seemed to be a sort of sitting-room, and was in disorder; cushions from a lounge lay about the floor; several books were scattered near them; an upholstered chair had been ripped open and disembowelled, and its excelsior stuffing strewn broadcast.

"This place looks as though it had been robbed!" whispered Vaux.

"What the deuce do you suppose has happened?"

They moved cautiously to the connecting-door of the room in the rear. The lamplight partly illuminated it, revealing it as a bedroom.

Bedclothes trailed to the floor, which also was littered with dingy masculine apparel flung about at random. Pockets of trousers and of coats had been turned inside out, in what apparently had been a hasty and frantic search.

The remainder of the room was in disorder, too; underwear had been pulled from dresser and bureau; the built-in wardrobe doors swung ajar and the clothing lay scattered about, every pocket turned inside out.

"For heaven's sake," muttered Vaux, "what do you suppose this means?"

"Look!" she whispered, clutching his arm and pointing to the fireplace at their feet.

On the white-tiled hearth in front of the unlighted gas-logs lay the stump of a cigar.

From it curled a thin thread of smoke.

They stared at the smoking stub on the hearth, gazed fearfully around the dimly lighted bedroom, and peered into the dark dining-room beyond.

Suddenly Miss Erith's hand tightened on his sleeve.

"Hark!" she motioned.

He heard it, too--a scuffling noise of heavy feet behind a closed door somewhere beyond the darkened dining-room.

"There's somebody in the kitchenette!" she whispered.

Vaux produced his pistol; they stole forward into the dining-room; halted by the table.

"Flash that door," he said in a low voice.

Her electric torch played over the closed kitchen door for an instant, then, at a whispered word from him, she shut it off and the dining-room was plunged again into darkness.

And then, before Vaux or Miss Erith had concluded what next was to be done, the kitchen door opened; and, against the dangling lighted bulb within, loomed a burly figure wearing hat and overcoat and a big ba.s.s voice rumbled through the apartment:

"All right, all right, keep your shirt on and I'll get your coat and vest for you--"

Then Miss Erith flashed her torch full in the man's face, blinding him. And Vaux covered him with levelled pistol.

Even then the man made a swift motion toward his pocket, but at Vaux's briskly cheerful warning he checked himself and sullenly and very slowly raised both empty hands.

"All right, all right," he grumbled. "It's on me this time. Go on; what's the idea?"

"W-well, upon my word!" stammered Vaux, "it's Ca.s.sidy!"