reat； he pushed desperately onwards。 He had descended some ninety feet； and had lost； in the devious windings of his downward path； all but the reflection of the light from the gallery； when he was rewarded by a glimpse of sunshine striking upwards。 He parted two enormous masses of seaweed； whose bubble…headed fronds hung curtainwise across his path； and found himself in the very middle of the narrow cleft of rock through which the sea was driven to the Blow…hole。
At an immense distance above him was the arch of cliff。 Beyond that arch appeared a segment of the ragged edge of the circular opening； down which he had fallen。 He looked in vain for the funnel…mouth whose friendly shelter had received him。 It was now indistinguishable。 At his feet was a long rift in the solid rock； so narrow that he could almost have leapt across it。 This rift was the channel of a swift black current which ran from the sea for fifty yards under an arch eight feet high； until it broke upon the jagged rocks that lay blistering in the sunshine at the bottom of the circular opening in the upper cliff。 A shudder shook the limbs of the adventurous convict。 He comprehended that at high tide the place where he stood was under water； and that the narrow cavern became a subaqueous pipe of solid rock forty feet long； through which were spouted the league…long rollers of the Southern Sea。
The narrow strip of rock at the base of the cliff was as flat as a table。 Here and there were enormous hollows like pans； which the retreating tide had left full of clear； still water。 The crannies of the rock were inhabited by small white crabs； and John Rex found to his delight that there was on this little shelf abundance of mussels； which； though lean and acrid； were sufficiently grateful to his famished stomach。 Attached to the flat surfaces of the numerous stones； moreover； were coarse limpets。 These； however； John Rex found too salt to be palatable； and was compelled to reject them。 A larger variety； however； having a succulent body as thick as a man's thumb； contained in long razor…shaped shells； were in some degree free from this objection； and he soon collected the materials for a meal。 Having eaten and sunned himself； he began to examine the enormous rock； to the base of which he had so strangely penetrated。 Rugged and worn； it raised its huge breast against wind and wave； secure upon a broad pedestal； which probably extended as far beneath the sea as the massive column itself rose above it。 Rising thus； with its shaggy drapery of seaweed clinging about its knees； it seemed to be a motionless but sentient beingsome monster of the deep； a Titan of the ocean condemned ever to front in silence the fury of that illimitable and rarely…travelled sea。 Yetsilent and motionless as he wasthe hoary ancient gave hint of the mysteries of his revenge。 Standing upon the broad and sea…girt platform where surely no human foot but his had ever stood in life； the convict saw； many feet above him； pitched into a cavity of the huge sun…blistered boulders； an object which his sailor eye told him at once was part of the top hamper of some large ship。 Crusted with shells； and its ruin so overrun with the ivy of the ocean that its ropes could barely be distinguished from the weeds with which they were encumbered； this relic of human labour attested the triumph of nature over human ingenuity。 Perforated below by the relentless sea； exposed above to the full fury of the tempest； set in solitary defiance to the waves； that rolling from the ice…volcano of the Southern Pole； hurled their gathered might unchecked upon its iron front； the great rock drew from its lonely warfare the materials of its own silent vengeance。 Clasped in iron arms； it held its prey； snatched from the jaws of the all…devouring sea。 One might imagine that； when the doomed ship； with her crew of shrieking souls； had splintered and gone down； the deaf； blind giant had clutched this fragment； upheaved from the seething waters； with a thrill of savage and terrible joy。
John Rex； gazing up at this memento of a forgotten agony； felt a sensation of the most vulgar pleasure。 〃There's wood for my fire！〃 thought he； and mounting to the spot； he essayed to fling down the splinters of timber upon the platform。 Long exposed to the sun； and flung high above the water…mark of recent storms； the timber had dried to the condition of touchwood； and would burn fiercely。 It was precisely what he required。 Strange accident that had for years stored； upon a desolate rock； this fragment of a vanished and long…forgotten vessel； that it might aid at last to warm the limbs of a villain escaping from justice！
Striking the disintegrated mass with his iron…shod heel； John Rex broke off convenient portions； and making a bag of his shirt by tying the sleeves and neck； he was speedily staggering into the cavern with a supply of fuel。 He made two trips； flinging down the wood on the floor of the gallery that overlooked the sea； and was returning for a third； when his quick ear caught the dip of oars。 He had barely time to lift the seaweed curtain that veiled the entrance to the chasm； when the Eaglehawk boat rounded the promontory。 Burgess was in the stern…sheets； and seemed to be making signals to someone on the top of the cliff。 Rex； grinning behind his veil； divined the manoeuvre。 McNab and his party were to search above； while the Commandant examined the gulf below。 The boat headed direct for the passage； and for an instant John Rex's undaunted soul shivered at the thought that； perhaps； after all； his pursuers might be aware of the existence of the cavern。 Yet that was unlikely。 He kept his ground； and the boat passed within a foot of him； gliding silently into the gulf。 He observed that Burgess's usually florid face was pale； and that his left sleeve was cut open； showing a bandage on the arm。 There had been some fighting； then； and it was not unlikely that all his fellow…desperadoes had been captured！ He chuckled at his own ingenuity and good sense。 The boat； emerging from the archway； entered the pool of the Blow…hole； and； held with the full strength of the party； remained stationary。 John Rex watched Burgess scan the rocks and eddies； saw him signal to McNab； and then； with much relief； beheld the boat's head brought round to the sea…board。
He was so intent upon watching this dangerous and difficult operation that he was oblivious of an extraordinary change which had taken place in the interior of the cavern。 The water which； an hour ago； had left exposed a long reef of black hummock…rocks； was now spread in one foam…flecked sheet over the ragged bottom of the rude staircase by which he had descended。 The tide had turned； and the sea； apparently sucked in through some deeper tunnel in the portion of the cliff which was below water； was being forced into the vault with a rapidity which bid fair to shortly submerge the mouth of the cave。 The convict's feet were already wetted by the incoming waves； and as he turned for one last look at the boat he saw a green billow heave up against the entrance to the chasm； and； almost blotting out the daylight； roll majestically through the arch。 It was high time for Burgess to take his departure if he did not wish his whale…boat to be cracked like a nut against the roof of the tunnel。 Alive to his danger； the Commandant abandoned the search after his late prisoner's corpse； and he hastened to gain the open sea。 The boat； carried backwards and upwards on the bosom of a monstrous wave； narrowly escaped destruction； and John Rex； climbing to the gallery； saw with much satisfaction the broad back of his out…witted gaoler disappear round the sheltering promontory。 The last efforts of his pursuers had failed； and in another hour the only accessible entrance to the convict's retreat was hidden under three feet of furious seawater。
His gaolers were convinced of his death； and would search for him no more。 So far； so good。 Now for the last desperate venturethe escape from the wonderful cavern which was at once his shelter and his prison。 Piling his wood together； and succeeding after many efforts； by the aid of a flint and the ring which yet clung to his ankle； in lighting a fire； and warming his chilled limbs in its cheering blaze； he set himself to meditate upon his course of action。 He was safe for the present； and the supply of food that the rock afforded was amply sufficient to sustain life in him for many days； but it was impossible that he could remain for many days concealed。 He had no fresh water； and though； by reason of the soaking he had received； he had hitherto felt little inconvenience from this cause； the salt and acrid mussels speedily induced a raging thirst； which he could not alleviate。 It was imperative that within forty…eight hours at farthest he should be on his way to the peninsula。 He remembered the little stream into whichin his flight of the previous night he had so nearly fallen； and hoped to be able； under cover of the darkness； to steal round the reef and reach it unobserved。 His desperate scheme was then to commence。 He had to run the gauntlet of the dogs and guards； gain the peninsula； and await the rescuing vessel。 He confessed to himself that the chances were terribly against him。 If Gabbett and the others had been recapturedas he devoutly trustedthe coast would be comparatively clear； but if they had escaped； he knew Burgess too well to think that he would give up the chase while hope of re…taking the absconders remained to him。 If indeed all fell out as he had wished； he had still to sustain life until Blunt found himif haply Blunt had not returned； wearied with useless and dangerous waiting。
As night came on； and the firelight showed strange shadows waving from the corners of the enormous vault； while the dismal abysses beneath him murmured and muttered with uncouth and ghastly utterance； there fell upon the lonely man the terror of Solitude。 Was this marvellous hiding…place that he had discovered to be his sepulchre？ Was hea monster amongst his fellow…mento die some monstrous death； entombed in this mysterious and terrible cavern of the sea？ He had tried to drive away these gloomy thoughts by sketching out for himself a plan of actio