"All evidence!" he said. "Keep in the shadow and bend down. I am going to stand on your shoulders and get into that window!"

Wondering at his daring, I nevertheless obeyed; and Harley succeeded, although not without difficulty, in achieving his purpose. A moment after he had disappeared in the blackness of the room above.

"Stand clear, Knox!" I heard.

Two of the cushion seats sometimes called "poof-ottomans" were thrown down, and:

"Up you come!" called Harley. "I'll grasp your hands if you can reach."

It proved no easy task, but I finally managed to scramble up beside my friend--to find myself in a dark and stuffy little room.

"This way!" said Harley rapidly--"upstairs."

He led the way without more ado, but it was with serious misgivings that I stumbled up a darkened stair in the rear of my greatly daring friend.

A pistol cracked in the darkness--and my fez was no longer on my head!

Harley's repeater answered, and we stumbled through a heavily curtained door into a heated room, the air of which was laden with some Eastern perfume. In the dim light from a silken-shaded lantern a figure showed, momentarily, darting across the place before us.

Again Harley's pistol spoke, but, as it seemed, ineffectively.

I had little enough opportunity to survey my surroundings; yet even in those brief, breathless moments I saw enough of the place wherein we stood to make me doubt the evidence of my senses! Outside, I knew, lay a dingy wharf, amid a maze of mean streets; here was an opulently furnished apartment with a strong Oriental note in the decorations!

s.n.a.t.c.hing an electric torch from his pocket, Harley leaped through a doorway draped with rich Persian tapestry, and I came close on his heels. Outside was darkness. A strong draught met us; and, pa.s.sing along a carpeted corridor, we never halted until we came to a room filled with the weirdest odds and ends, apparently collected from every quarter of the globe.

Crack!

A bullet flattened itself on the wall behind us!

"Good job he can't shoot straight!" rapped Harley.

The ray of the torch suddenly picked out the head and shoulders of a man who was descending through a trap in the floor! Ere we had time to shoot he was gone! I saw his brown fingers relax their hold--and a bundle which he had evidently hoped to take with him was left lying upon the floor.

Together we ran to the trap and looked down.

Slowly moving tidal water flowed darkly beneath us! For twenty breathless seconds we watched--but nothing showed upon the surface.

"I hope his swimming is no better than his shooting," I said.

"It can avail him little," replied Harley grimly; "a river-police boat is waiting for anyone who tries to escape from that side of the house.

We are by no means alone in this affair, Knox. But, firstly, what have we here!" He took up the bundle which the fugitive had deserted.

"Something incriminating when Ali of Cairo dared not stay to face it out! He would never have deserted this place in the ordinary way. That fellow who was such a bad shot was left behind, when the news of our approach reached here, to make a desperate attempt to remove some piece of evidence! I'll swear to it. But we were too soon for him!"

All the time he was busily removing the pieces of sacking and sc.r.a.ps of Oriental stuff with which the bundle was fastened; and finally he drew out a dress-suit, together with the linen, collar, shoes, and underwear--a complete outfit, in fact--and on top of the whole was a soft gray felt hat!

Eagerly Harley searched the garments for some name of a maker by which their owner might be identified. Presently, inside the lining of the breast pocket, where such a mark is usually found, he discovered the label of a well-known West End firm.

"The police can confirm it, Knox!" he said, looking up, his face slightly flushed with triumph; "but I, personally, have no doubt!"

"You may have no doubt, Harley," I retorted, "but I am full of doubt!

What is the significance of this discovery to which you seem to attach so much importance?"

"At the moment," replied my friend, "never mind; I still have hopes--although they have grown somewhat slender--of making a much more important discovery."

"Why not permit the police to aid in the search?"

"The police are more useful in their present occupation," he replied.

"We are dealing with the most cunning knave produced by East or West, and I don't mean to let him slip through my fingers if he is in this house! Nevertheless, Knox, I am submitting you to rather an appalling risk, I know; for our man is desperate, and if he is still in the place will prove as dangerous as a cornered rat."

"But the man who dropped through the trap?"

"The man who dropped through the trap," said Harley, "was not Ali of Cairo--and it is Ali of Cairo for whom I am looking!"

"The hunchback we saw to-night?"

Harley nodded, and having listened intently for a few moments, proceeded again to search the singular apartments of the abode. In each was evidence of Oriental occupancy; indeed, some of the rooms possessed a sort of Arabian Nights atmosphere. But no living creature was to be seen or heard anywhere. It was while the two of us, having examined every inch of wall, I should think, in the building, were standing staring rather blankly at each other in the room with the lighted lantern, that I saw Harley's expression change.

"Why," he muttered, "is this one room illuminated--and all the others in darkness?"

Even then the significance of this circ.u.mstance was not apparent to me.

But Harley stared critically at an electric switch which was placed on the immediate right of the door and then up at the silk-shaded lantern which lighted the room. Crossing, he raised and lowered the switch rapidly, but the lamp continued to burn uninterruptedly!

"Ah!" he said--"a good trick!"

Grasping the wooden block to which the switch was attached, he turned it bodily--and I saw that it was a masked k.n.o.b; for in the next moment he had pulled open the narrow section of wall--which proved to be nothing less than a cunningly fitted door!

A small, dimly lighted apartment was revealed, the Oriental note still predominant in its appointments, which, however, were few, and which I scarcely paused to note. For lying upon a mattress in this place was a pretty, fair-haired girl!

She lay on her side, having one white arm thrown out and resting limply on the floor, and she seemed to be in a semi-conscious condition, for although her fine eyes were widely opened, they had a gla.s.sy, witless look, and she was evidently unaware of our presence.

"Look at her pupils," rapped Harley. "They have drugged her with bhang!

Poor, pretty fool!"

"Good G.o.d!" I cried. "Who is this, Harley?"

"Molly Clayton!" he answered. "Thank heaven we have saved one victim from Ali of Cairo."

V

THE HAREM AGENCY

Owing to the instrumentality of Paul Harley, the public never learned that the awful riverside murder called by the Press in reference to the victim's shaven skull "the barber atrocity" had any relation to the Deepbrow case. It was physically impossible to identify the victim, and Harley had his own reasons for concealing the truth. The house on the wharf with its choice Oriental furniture was seized by the police; but, strange to relate, no arrest was made in connection with this most gruesome outrage. The man who dropped through the trap had been wounded by one of Harley's shots, and he sank for the last time under the very eyes of the crew of the police cutter.