"Is it silver?" Iris was almost excited.

"I do not think so. I am no expert, but I have a vague idea--I have seen----"

He wrinkled his brows and pressed away the furrows with his hand, that physical habit of his when perplexed.

"I have it," he cried. "It is antimony."

Miss Deane pursed her lips in disdain. Antimony! What was antimony?

"So much fuss for nothing," she said.

"It is used in alloys and medicines," he explained. "To us it is useless."

He threw the piece of rock contemptuously among the bushes. But, being thorough in all that he undertook, he returned to the cave and again conducted an inquisition. The silver-hued vein became more strongly marked at the point where it disappeared downwards into a collection of rubble and sand. That was all. Did men give their toil, their lives, for this? So it would appear. Be that as it might, he had a more pressing work. If the cave still held a secret it must remain there.

Iris had gone back to her sago-kneading. Necessity had made the lady a bread-maid.

"Fifteen hundred years of philology bridged by circ.u.mstance," mused Jenks. "How Max Muller would have reveled in the incident!"

Shouldering the axe he walked to the beach. The tide was low and the circular sweep of the reef showed up irregularly, its black outlines sticking out of the vividly green water like jagged teeth.

Much debris from the steamer was lying high and dry. It was an easy task for an athletic man to reach the palm tree, yet the sailor hesitated, with almost imperceptible qualms.

"A baited rat-trap," he muttered. Then he quickened his pace. With the first active spring from rock to rock his unacknowledged doubts vanished. He might find stores of priceless utility. The reflection inspired him. Jumping and climbing like a cat, in two minutes he was near the tree.

He could now see the true explanation of its growth in a seemingly impossible place. Here the bed of the sea bulged upwards in a small sand cay, which silted round the base of a limestone rock, so different in color and formation from the coral reef. Nature, whose engineering contrivances can force springs to mountain tops, managed to deliver to this isolated refuge a sufficient supply of water to nourish the palm, and the roots, firmly lodged in deep crevices, were well protected from the waves.

Between the sailor and the tree intervened a small stretch of shallow water. Landward this submerged saddle shelved steeply into the lagoon.

Although the water in the cove was twenty fathoms in depth, its crystal clearness was remarkable. The bottom, composed of marvelously white sand and broken coral, rendered other objects conspicuous. He could see plenty of fish, but not a single shark, whilst on the inner slope of the reef was plainly visible the destroyed fore part of the _Sirdar_, which had struck beyond the tree, relatively to his present standpoint. He had wondered why no boats were cast ash.o.r.e. Now he saw the reason. Three of them were still fastened to the davits and carried down with the hull.

Seaward the water was not so clear. The waves created patches of foam, and long submarine plants swayed gently in the undercurrent.

To reach Palm-tree Rock--antic.i.p.ating its subsequent name--he must cross a s.p.a.ce of some thirty feet and wade up to his waist.

He made the pa.s.sage with ease.

Pitched against the hole of the tree was a long narrow case, very heavy, iron-clamped; and marked with letters in black triangles and the broad arrow of the British Government.

"Rifles, by all the G.o.ds!" shouted the sailor. They were really by the Enfield Small Arms Manufactory, but his glee at this stroke of luck might be held to excuse a verbal inaccuracy.

The _Sirdar_ carried a consignment of arms and ammunition from Hong Kong to Singapore. Providence had decreed that a practically inexhaustible store of cartridges should be hurled across the lagoon to the island. And here were Lee-Metfords enough to equip half a company.

He would not risk the precious axe in an attempt to open the case. He must go back for a crowbar.

What else was there in this storehouse, thrust by Neptune from the ocean bed? A chest of tea, seemingly undamaged. Three barrels of flour, utterly ruined. A saloon chair, smashed from its pivot. A battered chronometer. For the rest, fragments of timber intermingled with pulverized coral and broken crockery.

A little further on, the deep-water entrance to the lagoon curved between sunken rocks. On one of them rested the _Sirdar's_ huge funnel. The north-west section of the reef was bare. Among the wreckage he found a coil of stout rope and a pulley. He instantly conceived the idea of constructing an aerial line to ferry the chest of tea across the channel he had forded.

He threaded the pulley with the rope and climbed the tree, adding a touch of artistic completeness to the ruin of his trousers by the operation. He had fastened the pulley high up the trunk before he realized how much more simple it would be to break open the chest where it lay and transport its contents in small parcels.

He laughed lightly. "I am becoming addleheaded," he said to himself.

"Anyhow, now the job is done I may as well make use of it."

Recoiling the rope-ends, he cast them across to the reef. In such small ways do men throw invisible dice with death. With those two lines he would, within a few fleeting seconds, drag himself back from eternity.

Picking up the axe, he carelessly stepped into the water, not knowing that Iris, having welded the incipient sago into a flat pancake, had strolled to the beach and was watching him.

The water was hardly above his knees when there came a swirling rush from the seaweed. A long tentacle shot out like a la.s.so and gripped his right leg. Another coiled round his waist.

"My G.o.d!" he gurgled, as a horrid sucker closed over his mouth and nose. He was in the grip of a devil-fish.

A deadly sensation of nausea almost overpowered him, but the love of life came to his aid, and he tore the suffocating feeler from his face.

Then the axe whirled, and one of the eight arms of the octopus lost some of its length. Yet a fourth flung itself around his left ankle. A few feet away, out of range of the axe, and lifting itself bodily out of the water, was the dread form of the cuttle, apparently all head, with distended gills and monstrous eyes.

The sailor's feet were planted wide apart. With frenzied effort he hacked at the murderous tentacles, but the water hindered him, and he was forced to lean back, in superhuman strain, to avoid losing his balance. If once this terrible a.s.sailant got him down he knew he was lost. The very need to keep his feet prevented him from attempting to deal a mortal blow.

The cuttle was anch.o.r.ed by three of its tentacles. Its remaining arm darted with sinuous activity to again clutch the man's face or neck.

With the axe he smote madly at the curling feeler, diverting its aim time and again, but failing to deliver an effective stroke.

With agonized prescience the sailor knew that he was yielding. Were the devil-fish a giant of its tribe he could not have held out so long. As it was, the creature could afford to wait, strengthening its grasp, tightening its coils, pulling and pumping at its prey with remorseless certainty.

He was nearly spent. In a paroxysm of despair he resolved to give way, and with one mad effort seek to bury the axe in the monster's brain.

But ere he could execute this fatal project--for the cuttle would have instantly swept him into the trailing weeds--five revolver shots rang out in quick succession. Iris had reached the nearest rock.

The third bullet gave the octopus cause to reflect. It squirted forth a torrent of dark-colored fluid. Instantly the water became black, opaque. The tentacle flourishing in air thrashed the surface with impotent fury; that around Jenks's waist grew taut and rigid. The axe flashed with the inspiration of hope. Another arm was severed; the huge dismembered coil slackened and fell away.

Yet was he anch.o.r.ed immovably. He turned to look at Iris. She never forgot the fleeting expression of his face. So might Lazarus have looked from the tomb.

"The rope!" she screamed, dropping the revolver and seizing the loose ends lying at her feet.

She drew them tight and leaned back, pulling with all her strength. The sailor flung the axe to the rocks and grasped the two ropes. He raised himself and plunged wildly. He was free. With two convulsive strides he was at the girl's side.

He stumbled to a boulder and dropped in complete collapse. After a time he felt Iris's hand placed timidly on his shoulder. He raised his head and saw her eyes shining.

"Thank you," he said. "We are quits now."

CHAPTER VI

SOME EXPLANATIONS

Fierce emotions are necessarily transient, but for the hour they exhaust the psychic capacity. The sailor had gone through such mental stress before it was yet noon that he was benumbed, wholly incapable of further sensation. Seneca tells how the island of Theresaea arose in a moment from the sea, thereby astounding ancient mariners, as well it might. Had this manifestation been repeated within a cable's length from the reef, Jenks was in mood to accept it as befitting the new order of things.

Being in good condition, he soon recovered his physical powers. He was outwardly little the worse for the encounter with the devil-fish. The skin around his mouth was sore. His waist and legs were bruised. One sweep of the axe had cut clean through the bulging leather of his left boot without touching the flesh. In a word, he was practically uninjured.

He had the doglike habit of shaking himself at the close of a fray. He did so now when he stood up. Iris showed clearer signs of the ordeal.

Her face was drawn and haggard, the pupils of her eyes dilated. She was gazing into depths, illimitable, unexplored. Compa.s.sion awoke at sight of her.