It was at a late hour on the night of this concluding tragedy that I learned the amazing truth underlying the case. Wess.e.x was still at work in the East End upon the hundred and one formalities which attached to his office, and Harley and I sat in the study of my friend's chambers in Chancery Lane.

"You see," Harley was explaining. "I got my first clue down at Deepbrow.

The tracks leading to the motor-car. They showed--to anyone not hampered by a preconceived opinion--that the girl and Vane had not gone on together (since the man's footprints proved him to have been running), but that she had gone first and that he had run after her! Arguments: (a) He heard the approach of the car; or (b) he heard her call for help.

In fact, it almost immediately became evident to me that someone else had met her at the end of the lane; probably someone who expected her, and whom she was going to meet when she, accidentally, encountered Vane!

The captain was not attired for an elopement, and, more significant still, he said he should stroll to the Deep Wood, and that was where he did stroll to; for it borders the road at this point!

"I had privately ascertained, from the postman, that Molly Clayton actually received a letter on that morning! This resolved my last doubt.

She was not going to meet Vane on the night of her disappearance.

"Then whom?"

"The old love! He who some months earlier had had over fifty seductive pictures of this undoubtedly pretty girl prepared for a purpose of his own!"

"Vane interfered?"

"When the girl saw that they meant to take her away, she no doubt made a fuss! He ran to the rescue! They had not reckoned on his being there, but these are clever villains, who leave no clues--except for one who has met them on their own ground!"

"On their own ground! What do you mean, Harley? Who are these people?"

"Well--where do you suppose those fifty photographs went?"

"I cannot conjecture!"

"Then I will tell you. The turmoil in the East has put wealth and power into unscrupulous hands. But even before the war there were marts, Knox--open marts--at which a Negro girl might be purchased for some 30 pounds, and a Circa.s.sian for anything from 250 pounds to 500 pounds! Ah!

You stare! But I a.s.sure you it was so. Here is the point, though: there were, and still are, private dealers! Those photographs were circulated among the nouveaux riches of the East! They were employed in the same way that any other merchant employs a catalogue. They reached the hands of many an opulent and abandoned 'profiteer' of Damascus, Stambul--where you will. Molly's picture would be one of many. Remember that hundreds of pretty girls disappear from their homes--taking the whole of the world--every year. Clearly, English beauty is popular at the moment!

And," he added bitterly, "the arch-villain has escaped!"

"Ali of Cairo!" I cried. "Then Ali of Cairo------"

"Is the biggest slave-dealer in the East!"

"Good G.o.d! Harley--at last I understand!"

"I was slow enough to understand it myself, Knox. But once the theory presented itself I asked Wess.e.x to get into immediate touch with the valet he had already interviewed at Deepbrow. It was the result of his inquiry to which he referred when we met him at Scotland Yard to-night.

Captain Vane had a large mole on his shoulder and a girl's name, together with a small device, tattooed on his forearm--a freak of his Sandhurst days------"

"Then 'the man with the shaven skull'------"

"Is Captain Ronald Vane! May he rest in peace. But I never shall until the crook-back dealer in humanity has met his just deserts."

THE WHITE HAT

I

MAJOR JACK RAGSTAFF

"Hallo! Innes," said Paul Harley as his secretary entered. "Someone is making a devil of a row outside."

"This is the offender, Mr. Harley," said Innes, and handed my friend a visiting card.

Glancing at the card, Harley read aloud:

"Major J. E. P. Ragstaff, Cavalry Club."

Meanwhile a loud harsh voice, which would have been audible in a full gale, was roaring in the lobby.

"Nonsense!" I could hear the Major shouting. "Balderdash! There's more fuss than if I had asked for an interview with the Prime Minister.

Piffle! Balderdash!"

Innes's smile developed into a laugh, in which Harley joined, then:

"Admit the Major," he said.

Into the study where Harley and I had been seated quietly smoking, there presently strode a very choleric Anglo-Indian. He wore a horsy check suit and white spats, and his tie closely resembled a stock. In his hand he carried a heavy malacca cane, gloves, and one of those tall, light-gray hats commonly termed white. He was below medium height, slim and wiry; his gait and the shape of his legs, his build, all proclaimed the dragoon. His complexion was purple, and the large white teeth visible beneath a bristling gray moustache added to the natural ferocity of his appearance. Standing just within the doorway:

"Mr. Paul Harley?" he shouted.

It was apparently an inquiry, but it sounded like a reprimand.

My friend, standing before the fireplace, his hands in his pockets and his pipe in his mouth, nodded brusquely.

"I am Paul Harley," he said. "Won't you sit down?"

Major Ragstaff, glancing angrily at Innes as the latter left the study, tossed his stick and gloves on to a settee, and drawing up a chair seated himself stiffly upon it as though he were in a saddle. He stared straight at Harley, and:

"You are not the sort of person I expected, sir," he declared. "May I ask if it is your custom to keep clients dancin' on the mat and all that--on the blasted mat, sir?"

Harley suppressed a smile, and I hastily reached for my cigarette-case which I had placed upon the mantelshelf.

"I am always naturally pleased to see clients, Major Ragstaff," said Harley, "but a certain amount of routine is necessary even in civilian life. You had not advised me of your visit, and it is contrary to my custom to discuss business after five o'clock."

As Harley spoke the Major glared at him continuously, and then:

"I've seen you in India!" he roared; "damme! I've seen you in India!--and, yes! in Turkey! Ha! I've got you now sir!" He sprang to his feet. "You're the Harley who was in Constantinople in 1912."

"Quite true."