"Can you reach him?" he asked abruptly. She nodded.
"Alright. Call him and tell him to beat it up here. Tell him he won't be molested by the police, and after the brawl's over, he can go back into hiding. But after that it's open season if I catch him. Use your phone. Wire may be tapped, but we'll have to take the chance. I'll go downstairs and use the booth in the office. Lock the door, and don't open it to anybody until I get back."
When the bolts clicked behind him, Harrison turned down the corridor toward the stairs. The apartment house boasted no elevator. He watched all sides warily as he went. A peculiarity of architecture had, indeed, practically isolated that wing. The wall opposite Joan's doors was blank. The only way to reach the other suites on that floor was to descend the stair and ascend another on the other side of the building.
As he reached the stair he swore softly; his heel had crunched a small vial on the first step. With some vague suspicion of a planted poison trap he stooped and gingerly investigated the splintered bits and the spilled contents. There was a small pool of colorless liquid which gave off a pungent, musky odor, but there seemed nothing lethal about it.
"Some damned Oriental perfume Joan dropped, I reckon," he decided. He descended the twisting stair without further delay and was presently in the booth in the office which opened on the street; a sleepy clerk dozed behind the desk.
Harrison got the chief of police on the wire and began abruptly.
"Say, Hoolihan, you remember that Afghan, Khoda Khan, who knifed a Chinaman about three months ago? Yes, that's the one. Well, listen: I'm using him on a job for a while, so tell your men to lay off, if they see him. Pass the word along pronto. Yes, I know it's very irregular; so's the job I hold down. In this case it's the choice of using a fugitive from the law, or seeing a law-abiding citizen murdered. Never mind what it's all about. This is my job, and I've got to handle it my own way. All right; thanks."
He hung up the receiver, thought vigorously for a few minutes, and then dialed another number that was definitely not related to the police station. In place of the chief's booming voice there sounded at the other end of the wire a squeaky whine framed in the argot of the underworld.
"Listen, Johnny," said Harrison with his customary abruptness, "you told me you thought you had a lead on the Kossova murder. What about it?"
"It wasn't no lie, boss!" The voice at the other end trembled with excitement. "I got a tip, and it's big!—big! I can't spill it over the phone, and I don't dare stir out. But if you'll meet me at Shan Yang's hop joint, I'll give you the dope. It'll knock you loose from your props, believe me it will!"
"I'll be there in an hour," promised the detective. He left the booth and glanced briefly out into the street. It was a misty night, as so many River Street nights are. Traffic was only a dim echo from some distant, busier section. Drifting fog dimmed the street lamps, shrouding the forms of occasional passers-by. The stage was set for murder; it only awaited the appearance of the actors in the dark drama.
Harrison mounted the stairs again. They wound up out of the office and up into the third story wing without opening upon the second floor at all. The architecture, like much of it in or near the Oriental section, was rather unusual. People of the quarter were notoriously fond of privacy, and even apartment houses were built with this passion in mind. His feet made no sound on the thickly carpeted stairs, though a slight crunching at the top step reminded him of the broken vial again momentarily. He had stepped on the splinters.
He knocked at the locked door, answered Joan's tense challenge and was admitted. He found the girl more self-possessed.
"I talked with Khoda Khan. He's on his way here now. I warned him that the wire might be tapped—that our enemies might know as soon as I called him, and try to stop him on his way here."
"Good," grunted the detective. "While I'm waiting for him I'll have a look at your suite."
There were four rooms, drawing room in front, with a large bedroom behind it, and behind that two smaller rooms, the maid's bedroom and the bathroom. The maid was not there, because Joan had sent her away at the first intimation of danger threatening. The corridor ran parallel with the suite, and the drawing room, large bedroom and bathroom opened upon it. That made three doors to consider. The drawing room had one big east window, overlooking the street, and one on the south. The big bedroom had one south window, and the maid's room one south and one west window. The bathroom had one window, a small one in the west wall, overlooking a small court bounded by a tangle of alleys and board-fenced backyards.
"Three outside doors and six windows to be watched, and this the top story," muttered the detective. "I still think I ought to get some cops here." But he spoke without conviction. He was investigating the bathroom when Joan called him cautiously from the drawing room, telling him that she thought she had heard a faint scratching outside the door. Gun in hand he opened the bathroom door and peered out into the corridor. It was empty. No shape of horror stood before the drawing room door. He closed the door, called reassuringly to the girl, and completed his inspection, grunting approval. Joan La Tour was a daughter of the Oriental quarter. Long ago she had provided against secret enemies as far as special locks and bolts could provide. The windows were guarded with heavy iron-braced shutters, and there was no trapdoor, dumb waiter nor skylight anywhere in the suite.
"Looks like you're ready for a siege," he commented.
"I am. I have canned goods laid away to last for weeks. With Khoda Khan I can hold the fort indefinitely. If things get too hot for you, you'd better come back here yourself—if you can. It's safer than the police station —unless they burn the house down."
A soft rap on the door brought them both around.
"Who is it?" called Joan warily.
"I, Khoda Khan, sahiba," came the answer in a low-pitched, but strong and resonant voice. Joan sighed deeply and unlocked the door. A tall figure bowed with a stately gesture and entered.
Khoda Khan was taller than Harrison, and though he lacked something of the American's sheer bulk, his shoulders were equally broad, and his garments could not conceal the hard lines of his limbs, the tigerish suppleness of his motions. His garb was a curious combination of costume, which is common in River Street. He wore a turban which well set off his hawk nose and black beard, and a long silk coat hung nearly to his knees. His trousers were conventional, but a silk sash girdled his lean waist, and his foot-gear was Turkish slippers.
In any costume it would have been equally evident that there was something wild and untamable about the man. His eyes blazed as no civilized man's ever did, and his sinews were like coiled springs under his coat. Harrison felt much as he would have felt if a panther had padded into the room, for the moment placid but ready at an instant's notice to go flying into flaming-eyed, red-taloned action.
"I thought you'd left the country," he said.
The Afghan smiled, a glimmer of white amidst the dark tangle of his beard.
"Nay, sahib. That son of a dog I knifed did not die."
"You're lucky he didn't," commented Harrison. "If you kill him you'll hang, sure."
"Inshallah," agreed Khoda Khan cheerfully. "But it was a matter of izzat—honor. The dog fed me swine's flesh. But no matter. The memsahib called me and I came."
"Alright. As long as she needs your protection the police won't arrest you. But when the matter's finished, things stand as they were. I'll give you time to hide again, if you wish, and then I'll try to catch you as I have in the past. Or if you want to surrender and stand trial, I'll promise you as much leniency as possible."