"h.e.l.lo, old man!" he exclaimed. "Awake, eh?"

"What's the time?" asked d.i.c.k drowsily.

Devereux consulted his watch.

"Twenty-three minutes past two," he announced.

"Never!" e.j.a.c.u.l.a.t.ed Crosthwaite incredulously. "Surely I haven't----"

"Yes, you have," interrupted Devereux with a laugh. "Seven and three-quarter hours of solid sleep! Sorry I disturbed you."

"You didn't," declared d.i.c.k. "It was the engines."

"We're on the move again," explained his companion. "We're following a small paddle-boat. Huxtable fancies it's the one that piloted us here.

He may be right--he generally is. If so, it's a rare slice of luck.

Look at young Farnworth. Submarine life apparently suits him, for he's doing his level best to sleep the clock round."

Just then a bell clanged. The Lieutenant-Commander's voice could be heard ordering the ballast tanks to be blown.

"I must be off," exclaimed Devereux. "It's action stations.

Something's up."

d.i.c.k was out of his bunk in a trice, but before he gained the door he heard the order being given to charge both tubes.

The submarine was about to attack yet another victim.

CHAPTER XVII

Within Sight of Constantinople

Instinctively d.i.c.k Crosthwaite made his way to the conning-tower, where Lieutenant-Commander Huxtable was standing by the bowl of the periscope. The latter took no notice of his involuntary guest; his whole attention was centred upon the ill-defined patch of light that, momentarily growing brighter, showed that the submarine was on the point of rising to launch her fatal missiles.

The meaningless blurr upon the periscope bowl merged into detail, for the eye-piece was now above water. The period of exposure was but a few brief seconds, but it was sufficient to show a large Turkish transport moored alongside the Galata Quay, and in the act of shipping troops as fast as the men could pa.s.s along the gangways.

Huxtable rapped out an expression of annoyance. He had made the discovery that the submarine was in the clutches of a strong current.

The chance, then, of "getting home" with a torpedo was doubly difficult, for already the British craft was well on the transport's quarter.

"Down to thirty-four; charge firing-tank; flood both torpedo-tubes; stand by!" he ordered, with hardly a break between the terse commands.

"All ready, sir," replied the leading torpedoman smartly.

For three minutes the submarine forged ahead diagonally against the current. The Lieutenant-Commander intended the range to be a short one.

"At fifteen feet. Fire!"

Barely had the torpedoes left the tubes when the submarine dived again.

Swept by the current, in addition to the "easy ahead" movement of the motors, she rapidly left the scene of her latest activities, to the accompaniment of a hot fusillade. The Turkish gunners on the sh.o.r.e batteries were madly blazing away at every visible object of wreckage from the stricken troop-ship, while the British craft glided serenely out of the danger area.

Yet, in spite of the risk of being plugged by a sh.e.l.l, Huxtable felt compelled to have a look at the work of destruction. The transport was already on the bottom, with a p.r.o.nounced list to starboard and away from the quayside. Hundreds of panic-stricken troops were lining her sh.o.r.eward side or leaping frantically to land.

"At all events the survivors won't show up at the Dardanelles in a hurry," remarked Huxtable. "Now to save ourselves."

Down went the submarine to sixty feet, a course being shaped for the Bosphorus; but before the vessel had covered a distance of half a mile, a dull grating sound announced that she had run heavily upon a shingle bank.

Caught by the current her stern swung round, till, pinned broadside on by the rush of water, she lay rocking sluggishly on the bed of the sea.

To obtain her bearings by means of the periscope would mean destruction by the powerful sh.o.r.e batteries. To attempt to rise to clear the bank would result in the submarine being swept into shoal water before she could answer her helm. All that could be done was to deprive her of all her available controllable buoyancy, in order to resist the pressure of the surging stream, and await the horrors of darkness.

For defensive work in her proper role the submarine was now useless.

She had fired her last pair of torpedoes. On the surface she might be able to put up a fight by means of her two quick-firers, but against destroyers and sh.o.r.e-batteries these weapons were quite inadequate.

Night drew on. With the setting of the sun powerful search-lights swept the Golden Horn to the Bosphorus, while the now alert Turkish gunners stood by their guns, ready at the first sight of a periscope to send the Giaours to Eblis, for there was a strong suspicion that the daring British craft would still be lurking in the vicinity in order to attempt another act of destruction.

"Time, I fancy," declared Huxtable, as the hands of the clock on the wall of the conning-tower pointed to the hour of midnight. Officers and men heaved a sigh of relief. Anything seemed better than lying motionless on the bed of the channel.

It was inexpedient to start the motors. The submarine must be raised under the influence of her reserve of buoyancy until there was no chance of her propeller blades being snapped off by contact with the shoal.

The periscope showed nothing beyond a confusing display of search-lights. Huxtable took the craft up still more until her conning-tower was awash. To his surprise he found that the submarine was drifting almost across the bows of a large coal-hulk, which was moored about two hundred yards from sh.o.r.e. A similar type of vessel lay fifty yards from, and abreast of, the hulk. Both craft, owing to their being practically denuded of coal--a commodity of which the Turks were greatly in need--towered high out of the water. There were no signs of ship-keepers. Darkness and solitude seemed to be in sole possession.

In a flash Huxtable realized that, if he could make fast alongside one of the hulks, the submarine would be in comparative shelter from the piercing rays of the search-lights, since the second hulk would screen his craft from the direct play of their beams.

It was a desperate move, but like most desperate operations its audacity almost promised success. With a slight, almost imperceptible shock, one of the protective girders encircling the submarine engaged the mooring chain of the hulk. Round swung the submarine, and before she could slip from the embrace of the heavy chain two of her crew, emerging through the fore-hatch, deftly bent a wire hawser to one of the links, and, cautiously checking the boat's way, succeeded in bringing her alongside the coaling craft.

No hail came from this vessel. The hulk was seemingly deserted.

Having no supplies on board, the Turkish authorities did not see the necessity of keeping watchmen there, or else the ship-keepers had taken a chance of going ash.o.r.e.

Huxtable's command was not a second too soon in bringing up alongside, for a search-light playing full upon the hulk silhouetted her outlines and threw a deep shadow athwart the submarine.

Lying at full length upon the wet deck, the two seamen awaited the order to cast off should necessity arise, while the Lieutenant-Commander, thrusting his head and shoulders through the conning-tower hatchway, made a deliberate survey of the limited expanse that met his gaze.

"Dashed if I know where we are," he exclaimed, for owing to the extinguishing of the recognized navigation lights, the almost total absence of lamps ash.o.r.e, and above all the disconcerting glare of the search-lights, the skipper was unable to fix his position.

"May I have a look round, sir?" asked d.i.c.k. "I've put in part of a commission in these waters."

"Do so, by all means," replied Huxtable warmly. "Only take care you don't get spotted. If you are, make a blind rush for the conning-tower. Every second would be precious."

Clambering through the hatchway the Sub gained the limited s.p.a.ce formed by the navigation platform. He, too, found that the hulls of the two hulks obstructed his view.

"I'll get on board this craft," said d.i.c.k, indicating the hulk alongside of which the submarine was lying. "It seems quite deserted."

"Carry on, then!" a.s.sented the Lieutenant-Commander; "but, mind you, we don't want to have to leave you behind."

"And I'm sure I don't want to be left," said Crosthwaite with a laugh.

"I'll exercise caution."

The hulk was fitted with parallel rows of horizontal wooden ledges to serve as fenders. At whatever depth she drew--for her draught varied considerably according to the quant.i.ty of coal stowed on board--one of these fenders would always be in contact with any craft that happened to be lying alongside. Between the ledges were wooden ladders, to enable the ship-keepers to board from a boat.