Meanwhile Mr. Narkom and his zealous assistants had rushed wildly on, coming forth at last from the old railway arch into the narrow lane without so much as catching a glimpse or finding the slightest trace of either victim or murderer.

But that they had not all been deceived by an hallucination of the night, received proof from the triumphant discovery of Sergeant Petrie, who, with the aid of his torch and the bull’s-eye lantern of Constable Mellish, had found the unmistakable traces of hurried footsteps on the soft, yielding earth.

“Lummy, sir! the place is alive with ’em,” ejaculated Mellish. “This is the way he went, sir, down this ‘ere lane, and makin’ for the right of way across the fields, like wot that shuvver of yours said, sir.”

Narkom, Hammond, and Petrie were at his side before he had finished speaking. It was true, other footprints were there, all the lonely tree-girt road was full of them, going down the centre in one long, unbroken line. They stopped but a moment to make sure of this, then rose and dashed on in the direction which they led.

Straight on, down the middle of the thoroughfare, without break or interruption, the foot-made trail drew them; under dripping overshadowing trees; by natural hedges and unnatural mounds where weeds and briars scrambled over piles of debris, and the light of their torches showed Narkom and his men the dim irregular outlines of a crumbling wall, green with moss and lichen and higher in parts than a man’s head.

On and still on, the deeply dug footprints lessening not a whit in their clearness, until, all of a moment, they swerved slightly to the left and then abruptly stopped stopped dead short, and after that were seen no more!

“Here’s where he went!” called out Hammond, pointing to the left as Narkom and the others, in a sort of panic, went running round and endeavouring to pick up the lost trail. “Look, sir grass here and the wall beyond. Hopped over on to the grass, that’s what he did, then scaled the wall and ‘went to earth’ like an idiot in that old house Lennard told us of. Come along quick!

“Fair copped him, sir, as sure as eggs,” he added excitedly, plunging in through the mist and the shadow of the trees until he came to the wall in question. “Break in the wall here, coping gone, dry dust of newly crumbled mortar on the grass. Got over here, Mr. Narkom yes, and cut himself doing it. Hand, most likely; for there are bits of mortar with broken glass stuck in ’em lying about and a drop of fresh blood on the top of the wall!”

A single look was enough, when Mr. Narkom came hurrying to his side, to verify all that had been said; and with an excited, “This way, all of you. Look sharp!” the superintendent sprang up, gripped the broken top of the wall, scrambled over it and dropped down into the darkness and mist upon the other side. The others followed his lead, and the next moment all were in the dark, walled-in enclosure in the middle of which the long-abandoned house known as Gleer Cottage stood. They could see nothing of it from where they were, for the mist and the crowded screen of long-neglected fruit trees shut it in as with a curtain.

“Better let me go ahead and light the way, gents,” said Constable Mellish in an excited whisper, as he again unshuttered his bull’s-eye and directed its gleam upon the matted and tangled verdure. “Stout boots and thick trousers is what’s wanted to tramp a path through these briars; them evening clothes of yours ’ud be torn to ribbons and your ankles cut to the bone before you’d gone a dozen yards. Lummy! there’s another of his footprints on the edge of that flower bed there! see! Come on, come on quick!”

Too excited and too much occupied with the work in hand to care who took the lead so that they got through the place and ran their quarry to earth, Narkom and the rest suffered the suburban constable to beat a way for them through the brambly wilderness, while with bodies bent, nerves tense as wire, treading on tiptoe along the trail that was being so cautiously blazed for them, they pressed on after him.

Suddenly, without hint or warning, a faint metallic “click” sounded, the light they were following went suddenly out, and before Narkom, realizing that Mellish had sprung the shutter over the flame of his lamp, could voice a whispered inquiry, the constable’s body lurched back against his own and a shaking hand descended upon his shoulder.

“Don’t move, don’t speak, sir!” said Mellish’s voice close to his ear. “We’ve got him right enough. He’s in the house itself, and with a light! There’s a board or something put up against the window to shield it, but you can see the light through the chinks coming and going, sir, like as he was carrying it about.”

Startling as the statement was, when Narkom and the rest came on tiptoe to the end of the trampled path and peeped around the last screening bush into the open beyond, they found it to be the case.

Blurred, shadowy, mist wrapped like the ghost of a house set in a ghostly garden there stood the long-abandoned building, its blank upper windows lost in the wrapping fog; its dreary face toward the distant road; its bleak, unlovely side fronting the point from which Narkom and his men now viewed it; and from one of the two side windows thin wavering lines of constantly shifting light issued from beneath the shadow of a veranda.

“Candlelight, sir, and a draught somewhere, nobody moving about,” whispered Hammond. “Window or a door open that’s what makes the light rise and fall. What an ass! Barricaded the window and never thought to stop up the chinks. Lord, for a fellow clever enough to get away from the constable and the keeper in the manner he did, you’d never look for an idiot’s trick like this.”

Narkom might have reminded him that it was an old, old failing on the part of the criminal class, this overlooking some trifling little point after a deed of almost diabolical cunning; but at present he was too much excited to think of anything but getting into that lighted room and nabbing his man before he slipped the leash again and escaped him.

Ducking down he led a swift but soundless flight across the open space until he and his allies were close up under the shadow of the building itself, where he made the rather surprising discovery that the rear door was unlocked. Through this they made their way down a passage, at the end of which was evidently the room they sought, for a tiny thread of light lay between the door and the bare boards of the passage. Here they halted a moment, their nerves strung to breaking point and their hearts hammering thickly as they now heard a faint rustling movement and a noise of tearing paper sounding from behind it.

For a moment these things alone were audible; then Narkom’s hand shot upward as a silent signal; there was a concerted movement, a crash that carried a broken door inward and sent echoes bellowing and bounding from landing to landing and wall to wall, a gush of light, a scramble of crowding figures, a chorus of excited voices, and the men of Scotland Yard were in the room.

But no cornered criminal rose to do battle with them, and no startled outcry greeted their coming nothing but the squeal and scamper of frightened rats bolting to safety behind the wainscot; a mere ripple of sound, and after it a silence which even the intruders had not breath enough to break with any spoken word.

With peeling walls and mouldering floor the long, low-ceiled room gaped out before them, littered with fallen plaster and thick with dust and cobwebs. On the floor, in the blank space between the two boarded-up windows, a pair of lighted candles guttered and flared, while behind them, with arms outstretched, sleeves spiked to the wall a human crucifix, with lolling head and bended knees a dead man hung, and the light shining upon his distorted face revealed the hideous fact that he had been strangled to death.

However many his years, they could not have totalled more than five and thirty at most, and ghastly as he was now, in life he must have been strikingly handsome: fair of hair and moustache, lean of loin and broad of shoulder, and with that subtle something about him which mutely stands sponsor for the thing called birth.

He was clad in a long gray topcoat of fine texture and fashionable cut a coat unbuttoned and flung open by the same furious hand which had rent and torn at the suit of evening clothes he wore beneath.

The waistcoat was wrenched apart and a snapped watch chain dangled from it, and on the broad expanse of shirt bosom thus exposed there was rudely smeared in thick black letters as if a finger had been dipped for the purpose in blacking or axle grease a string of mystifying numerals running thus:

For a moment the men who had stumbled upon this appalling sight stood staring at it in horrified silence; then Constable Mellish backed shudderingly away and voiced the first spoken word.

“The Lord deliver us!” he said in a quaking whisper. “Not the murderer himself, but the party as he murdered! A gent a swell strangled in a place like this! Gawd help us! what was a man like that a-doing of here? And besides, the shot was fired out there on the Common as you know yourselves. You heard it, didn’t you?”

Nobody answered him. For Narkom and his men this horrifying discovery possessed more startling, more mystifying, more appalling surprises than that which lay in the mere finding of the victim of a tragedy where they had been confident of running to earth the assassin alone. For in that ghastly dead thing spiked to the crumbling wall they saw again a man who less than four hours ago had stood before them in the full flower of health and strength and life.

“Good God!” gasped Hammond, laying a shaking hand upon Narkom’s arm. “You see who it is, don’t you, sir? It’s the Austrian gent who was at Clavering Close to-night Count Whats-his-name!”

“De Louvisan Count Franz de Louvisan,” supplied Narkom agitatedly. “The last man in the world who should have shown himself in the home of the man whose sweetheart he was taking away, despite the lady’s own desires and entreaties! And to come to such an end to-night in such a place as this after such an interview with the two people whose lives he was wrecking.... Good God!”

A thought almost too horrible to put into words lay behind that last excited exclamation, for his eyes had fallen on a thin catgut halter a violoncello string thus snatched from its innocent purpose, and through his mind had floated the strains of the music with which Lady Katharine Fordham had amused the company but a short time before. He turned abruptly to his men and had just opened his mouth to issue a command when the darkness and silence without were riven suddenly by the hooting of a motor horn and the voice of Lennard shouting.

“Stop!” commanded Narkom, as the men made an excited step toward the door. “Search this house guard it don’t let any one enter or leave it until I come back. If any living man comes near it, arrest him, no matter who or what he is. But don’t leave the place unguarded for a single instant remember that. There’s only one man in the world for this affair. Stop where you are until I return with him.”

Then he flung himself out of the room, out of the house, and ran as fast as he could fly in the direction of the tooting horn. At the point where the branching arm of the “Y” joined the main portion of Mulberry Lane, he caught sight of two huge, glaring motor lamps coming toward him through the mist and darkness. In a twinkling the limousine had halted in front of him, and Lennard was telling excitedly of that startling experience back there by the old railway arch.

“A woman, sir a young and beautiful woman! And she must have had something to do with this night’s business, gov’ner, or why should she be wandering about this place at such a time? Hop in quick, sir, and I’ll run you back to the spot where I saw her.”

At any other time, under any other circumstances, Narkom might, probably would, have complied with that request; but now A woman indeed! No woman’s hand could have nailed that grim figure to the wall of Gleer Cottage, at least not alone, not without assistance. This he realized; and brushing the suggestion aside, jumped into the limousine and slammed the door upon himself.

“Drive to Clarges Street! I must see Cleek! Full speed now! Don’t let the devil himself stop you!” he cried; and in a moment they were bounding away townward at a fifty-mile clip that ate up the distance like a cat lapping cream.