The drizzle had grown thicker, the night blacker, the early morning air still more chill. But Lanyard was moving too swiftly to be affected by this last circ.u.mstance; the first he anathematised with the perfunctory bitterness of a skilled artisan who sees his work in a fair way to be obstructed by elemental depravity. Another of his trade would have termed such weather conditions ideal, and so might the Lone Wolf on an everyday job; but the prospect of a footing rendered insecure by rain trebled the hazards attending a plan of campaign that would brook neither revision nor delay.

There was only one way to break into the house on Seventy-ninth Street; this Lanyard had appreciated upon his first reconnaissance of the previous afternoon. He could have wished for more time in which to prepare and a.s.semble tested equipment instead of relying upon chance to supply the requisite gear; but with all time at his disposal the mechanical difficulties of the problem would remain. Far from indifferent to these, Lanyard addressed himself to their conquest doggedly and with businesslike economy of motion.

Shunning the public paths he went over the park wall like a cat, sped across town through Eightieth Street, and so came to that plot of land upon which an apartment building was in process of erection, immediately to the north of the American headquarters of the Prussian spy system.

Walled in with stone two storeys deep, its gaunt skeleton of steel had been joined together as far as the seventh level. How much higher it was destined to rise was immaterial; for Lanyard's purpose it was enough that the frame had already outgrown its neighbour on the south.

A litter of lumber, huge steel girders, and other material narrowed the side street to half its normal width. The sidewalk s.p.a.ce was trampled earth roofed with heavy planks for the protection of pedestrian heads, a pa.s.sage lighted by electric bulbs widely s.p.a.ced; midway in this an entrance to the structure was flanked by a wooden shanty, by day a tool house, after working hours a shelter for the night watchman. This boasted one glazed window dull with orange light.

Approaching with due precaution, Lanyard peered in. The light came from a single electric bulb and a potbellied sheet-iron stove, glowing red. Near by, in a chair tipped against the wall, sat the watchman, corncob pipe in hand, head drooping, eyes closed, mouth ajar. A snore of the first magnitude seemed to vibrate the very walls. On the floor beside the chair stood a two-quart tin pail full of arid emptiness.

Dismissing further consideration of the watchman as a factor, satisfied that the entire neighbourhood as well was sound asleep, Lanyard darted up the plank walk that led into the building, then paused to get his bearings.

Effluvia of mortar and damp lumber saluted him in an uncanny place whose darkness was slightly qualified by a faint refracted glow from the low canopy of cloud and by equally dim shafts of diffused street light. There was more or less flooring of a temporary character over a sable gulf of cellars, and overhead a sullen, weeping sky cross-hatched with stark black ironwork.

With infinite patience Lanyard groped his way through that dark labyrinth to the foot of a ladder ascending an open shaft wherein a hoisting tackle dangled.

Here he stumbled over what he had been seeking, a great coil of one-inch hempen cable, from which he measured off roughly what he would require, if his calculations were correct, and something over. This length he re-coiled and slung over his shoulder: an awkward, weighty handicap. Nevertheless he began to climb.

Above the third level there was merely steel framework; he had somewhat more light to guide him, with a view of the north wall of the Seventy-ninth Street house, bright in the glare of avenue lamps.

The wall was absolutely blank.

At the seventh level the ladders ended. He stepped off upon a foot-wide beam, paused to make sure of his poise, and began to walk the girders with a sureness of foot any aviator might have envied.

At regular intervals he encountered uprights: between these he had to depend upon his sense of direction and equilibrium to guide him safely across those narrow walks of steel made slippery by rain.

But, thanks to forethought, his footwork was faultless: he wore shoes old, well-broken, very soft, flexible, and silent.

The building was in the shape of a squat E, with two courts facing south.

On this seventh level the first court was bridged by a single girder, the middle of which was Lanyard's immediate objective. Since it lacked uprights he took it cautiously on hands and knees until approximately equidistant from both ends, when he straddled it, took the cable from his shoulders, uncoiled a length and made it fast round the girder with a clove hitch: giddy work, in that darkness, on that greasy span, fashioning by simple sense of touch the knot upon which his life was to depend, half of the time p.r.o.ne upon the girder and fishing blindly beneath it for the rope's end, with nothing but a seventy--foot drop between him and eternity, not even another girder to break a fall....

He was now immediately opposite the minaret, at an elevation of about twenty feet above the roof he wished to reach, and as far away, or perhaps a trifle farther.

Still he detected no signs of life about that nest of spies: if the wireless were in operation its apparatus was well-housed; there was no sound of the spark, never a glimmer of its violet flash.

Laboriously--the knot completed to his satisfaction--Lanyard returned via the eastern arm of the E, paying out the coiled cable as he progressed, working round to the north side of the court.

Once again pausing opposite the minaret, he knotted the end of the cable loosely round an upright connecting with the sixth level, let it slide down, followed it, repeated the process, and rested finally on the fifth.

Now his ordeal approached a climax which he contemplated with what calmness he could while securing the rope beneath the arms.

In another sixty seconds or less it must be demonstrated whether his dead reckoning would set him down safe and sound on the roof or dash him against the walls of the Seventy-ninth Street house, to swing back and dangle impotently in mid-air till daylight and police discovered him--unless, escaping injury, he were able to pull himself up hand over hand to the girder.

With one arm round the upright to prevent the sag of rope from dragging him over prematurely, he essayed a final survey.

Either the murk deceived or Lanyard had judged shrewdly. His feet were on an approximate level with the coping round the roof, and he stood about as far from the upper girder to which the rope was. .h.i.tched as that was distant from the coping.

One look up and round at those louring skies, duskily flushed by subdued city lights: with no more ceremony Lanyard released the upright and committed his body to s.p.a.ce.

If the downward sweep was breathless, what followed was breath-taking: once past the nadir of that giant swing, he was borne upward by an impetus steadily and sensibly slackening.

Instant followed leaden-winged instant while the wall, looming like a mountainside, seemed to be toppling, insensately bent upon his annihilation; even so his momentum, decreasing with frightful swiftness, seemed possessed of demoniac desire to frustrate him.

After an age-long agony of doubt it became evident he was not destined to crash into the wall, but not that he was to gain the coping: through fractions of a second hideously protracted this last drew near, nearer, slowly, ever more slowly.

And he was twisting dizzily....

With frantic effort he crooked an arm over the coping at a juncture when, had he not acted instantly, he must have swung back. There was a racking wrench, as though his arm were being torn from its socket.

At the end of a struggle even more wearing he flung his other arm across the ledge, and for some time hung there, at the end of an almost taut rope, unable to overcome its resistance and pull himself in over the coping, stubbornly refusing to loose his grasp.

Presently, grown desperate, he let go with his right hand, holding fast only with the left, fumbled in a pocket, found his knife, opened it with his teeth, and began, to saw at the rope round his chest.

Strand after strand parted grudgingly till it fell away altogether and reaction from its tension threw him against the coping with such violence that he all but lost his hold. Dropping the knife, he swept his right arm up and once more hooked his fingers over the inside of the ledge.

Far down the knife clinked suggestively upon stone.

Breathing deep, Lanyard braced knees and feet against the wall, worried, heaved, hauled, squirmed like a mad thing, in the end rolled over the top and fell at length upon the roof, panting, trembling, bathed in sweat, temporarily tormented by impulses to retch.

By degrees regaining physical control, he sat up, took his bearings, and crept toward the foot of the minaret.

A small, narrow doorway in its base was on the latch. He pa.s.sed through to the landing of a dark winding stairway with a dim light at the bottom of its circular well.

While he stood attentive, intermittent stridor troubled the stillness, originating at some point on the floors below: the proscribed wireless was at work.

Hearing no other sounds, Lanyard went on down the steps, at their foot pausing to spy out through a half-open doorway to the topmost storey.

n.o.body moved in the corridor. He saw nothing but a line of closed doors, presumably to servants' quarters. Now, however, the vibrant rasp of the radio spark was perceptibly stronger and had a background of subdued noise, echoes of distant voices, deadened sounds of hasty footfalls, now and again a heavy thump or the bang of a door.

Moving out, he commanded the length of the corridor. Toward one end a door stood open. He could see no more of the room beyond than a narrow patch of wall fitfully illuminated by a play of violet light.

Then a man stepped out of this operating room, turning on the threshold to utter some parting observation; and Lanyard retired hastily to the shaft of the minaret stairway, but not before recognising Velasco.

A moment later the Brazilian pa.s.sed his lurking-place, walking with bended head, a worried frown darkening his swarthy countenance; and Lanyard emerged in time to see his head and shoulders vanish down a stairway at the far end of the corridor.

Following with discretion, Lanyard leaned over the head of the main staircase well, looking down three flights to the ground floor, to which Velasco was descending.

The house seemed veritably to hum with secret and, to judge by the pitch of its rumour, well-nigh panic activity. One divined a scurrying as of rats about to desert a sinking ship. Untoward events had thrown this establishment into a state of excited confusion: their nature Lanyard could not surmise, but their conjunction with his designs was exasperatingly inopportune. To search this place and find his man--if he were there at all--without being discovered, while its inmates buzzed about like so many startled hornets, was a fair impossibility; to attempt it was to court death.

None the less he was inflexible in determination to go on, to push his luck to its extremity, by sheer force to bend fortuity to his service and suffer without complaint whatever the consequences of its recoil.

Yet even as he advanced a foot to begin the descent, he withdrew it.

On the ground floor, a door closing with a resounding crash had proved the signal for an outburst of expostulant, acrimonious voices: some half a dozen men giving angry tongue at one and the same time, their roars of polysyllabic gutturalisms fusing into utterly unintelligible clamour.

One thought of a mutiny in a German madhouse.