Here was the dull blue wintry sea under the dull gray wintry sky. No wind blew, no rain fell. A thin, soft sea moisture rose from the sea and met a thin, soft cloud moisture descending from the clouds. The long, even roller of the Atlantic stole slowly, deliberately, sullenly, from the level plains of the ocean, growing to the eye imperceptibly as it came. The water was thickly streaked with tawny, vapid froth; the base of the high, impassable, brown rocky coast was marked by a broad but diminishing line of yellow foam.

No bird was visible in the air, no ship on the sea, no living creature on the land but the two men, O'Hanlon and O'Brien. A mile inland stood lonely Kilcash House, which had for years been the home of the dead man and his beautiful wife. Below, between the towering, oppressive, liver-coloured cliffs and the foam-mantled, blanched blue sea lay the Black Rock, a huge, flat, monstrous table cast off by the land and spurned by the sea.

For a while the two men stood speechless on the edge of the cliff overlooking the barren waste of heaving waters and the sullen ramparts of indomitable heights. The deep boom of the bursting wave, the roar of the outwashing boulders, and the shrill hiss of the falling spray, made the dismal scene more deserted and forlorn. The sea and cliffs were forbidding to man. They seemed to resent the presence of man--to desire, now that they were not engaged in actual war, no intrusion on the lines where their gigantic conflicts were waged.

The Black Rock stretched out half-a-mile from the base of the cliff into the sea, and was half-a-mile wide. Above it the land was slightly hollowed towards the sea, and would, but for the Black Rock beneath, form a bay-like indentation in the shore. The chord of this arc was about six hundred yards, so that the greater mass of the Black Rock projected into the sea beyond the heads of the cliffs.

The Rock, as it was called for brevity in the neighbourhood, was only a few feet above the reach of the waves and broken water when a strong wind blew from the south-west. It shelved outward, and when the waters were very rough, when a storm raged, the shattered waves leaped up on it, and bounded, hissing in irresistible fury, towards the inner cliff, but were arrested, dispersed, and poured down the sides of the Rock ere they reached the inner cliff. The Rock was highest at the centre, and descended to right, left, front, and rear. But although it was lower at the rear than in the centre, it was much higher there than in front. Viewed from above, it was not unlike the back of some prodigious sea monster rising above the surface of the water. In shape it resembled a vast creature of the barnacle kind, the apex of whose shell would represent the highest point of the Rock, and the corrugations stand for the ridges and hollows of the sides from the highest point of the ledge to the lower ones.

The colour, too, was not unlike that of a barnacle. For, although the people had given it the name of the Black Rock, it was black only by comparison with the cliffs. The surface was made up of smooth, slimy ridges, dark blue-green in the hollows, growing lighter as the curve sloped upward, and on the summit, here and there, deep yellow brown or oak.

Winter or summer, the Rock was never quite dry. It was always damp, clammy, treacherous. It was always dangerous to the foot. There was no fear of one who fell slipping into the sea, unless the misfortune occurred very near the brink. Then a fall and a plunge were certain death, for the great rollers of the ocean would grind or dash the life out of a man against these rocks in a few minutes. But many a man had slipped and hurt himself badly, and two fatally, on that cruel Black Rock.

Once a man of the village of Kilcash had fallen, broken his leg in two places, and been carried up the cliff path and across the downs to die. Another had slipped on the top of one ridge. For a moment his body swept backward in an arc like a bent bow, until his head touched the top of the next ridge behind. All his muscles instantly relaxed, his chin was crushed down upon his chest, he rolled for an instant into a shapeless heap, rolled down into the trough, and lay at full length with dead, wide open eyes turned upward to the sun. Several people had from time to time met with dire accidents on that dangerous slope by reason of the uncertain footing it afforded.

But the great terror of the Black Rock did not lie in the greasiness of its surface. The chief danger lay below the surface. The deadly monster of that desolate tract was hidden from view, until suddenly, and generally without warning, it sprang forth upon its victim, and seized him and bore him away to certain and awful death. It gave no chance of respite or rescue; it gave no time for thought or prayer. One moment man in the full vigour of life, full of the pride of life, full joy in life, stood upon that awful field of slippery rock, and the next was caught from behind and dragged into the foaming sea by a force no ten men could fight against for a moment.

All the year round this terrible monster of death lurked here, and upon provocation would rush out, and, when opportunity offered, invariably destroy. It could not be drowned with water or scared by fire, or slain with lethal weapons. It could not be lured or trapped. It would come to an end no one knew when. It had begun to exist centuries ago. It varied in length with the season of the year, and in bulk with the phases of the moon. It had its lair in a cave. No boat along all that coast durst enter the Whale's Mouth for fear of it; for although much could be foretold of its habits, all could not. No one could infallibly predict for an hour what it would do--except one thing: that any boat in that cave when it did appear would infallibly be dashed into a thousand splinters. That was the only thing certain about it. To be caught in its cave would, if possible, be still more terrible than to be caught by it on the Black Rock.

Its dimensions varied from twenty to a hundred and fifty feet one way by ten to twelve and six to eight another.

Along the whole coast it was spoken of with fear. Nothing else like it was known in those parts. It was one of the sights which made holiday makers seek the secluded fishing of Kilcash. The inhabitants knew its ways better than strangers. And yet people of the village had fallen a prey to its fury. More than a dozen villagers had within four generations died in its deadly embrace, and more than an equal number of visitors within the same period. Suppose the season visitors had been at their highest number all the year round, it had been calculated that forty of them would have been sacrificed in the time.

Over and over again visitors had been warned against going near the place; but the attraction of danger proved too strong for prudence, and people would go for mere bravado or out of morbid curiosity. The chance of contracting a fatal malady has no allurements for man: the prospect of a violent death fascinates him. The love of daring certain death by violence is found in few; the willingness to dare great peril by violence is almost universal in young men of healthy bodies and minds. It has been justly said that the most extraordinary contract into which large bodies of men ever voluntarily enter is that by which they agree to stand up in a field and allow themselves to be shot at for thirteenpence a day; and yet men risk their lives daily willingly, at a less price--nay, for no price at all.

Here, on this very Black Rock, a terrible instance occurred with disastrous result five years before, when three young Trinity College students were staying for the summer vacation at Kilcash. They were friends, and lodged in the same cottage. They went on little excursions together. Of course they had heard all about the terrors of the Black Rock. In an hour of eclipse they resolved not only to visit the fatal Rock, but to lunch there under circumstances of the greatest danger. They mentioned their intention freely, and were warned by the simple people of the village that they ran a risk in going to the spot they named, and at the time they selected, and that they absolutely courted death by delaying for luncheon. That afternoon one of the three ran the whole way back into the village and told the appalling tale. He had strayed a few yards from his friends, when suddenly burst upon his ears a thunderous roar. The Rock shook beneath his feet as though it would burst asunder. He was instantly covered and blinded with mist and sea smoke. He gave himself up for lost, and instinctively ran towards the cliff. Then he heard a fearful crash of waters, and again the Rock shook. He wondered his destruction had been so long delayed. He waited until all was still. He turned round. His friends had disappeared. Their bodies were never recovered.

As it has been said, the Black Rock was not in reality black, but a dark, dirty olive green. Perhaps it got its name from the dark or black deeds which had been enacted on it.

Around the Black Rock the cliffs do not stand very high. They reach to little more than a hundred feet above the solid shelf below. In colour they are of a deep liver hue. They lean outward and take the form of huge broad broken pilasters, set against an irregular wall. These cliffs, like the Rock, are always damp, but, unlike the Rock, never clammy. They are smooth and flat, with sharp angles and rectangular fractures. They are cold and hard, and seem built by nature to define for ever the frontier of the ocean.

At the point of the Rock furthest inland the cliff is of a softer nature, and hence the water has eaten deeper in here. The cliff is part clay, part gravel, and part boulder. Here is a temporary break in the continuity of the regular formation. There is no depression on the downs above to correspond with this fault. Thus at the back of what has been called the bay, there are about two hundred yards long of cliff, which the sea would soon tear away if it could get at it. But the Black Rock stood between the greedy ocean and the vulnerable point of the cliff. It formed a sufficient outpost. This part of the bay slants inwards, not outwards, as the two arms. In this part a little copper ore was once found, and a shaft sunk. But the mine proved of no practical value, and, after absorbing much money, was abandoned fifty years ago. The shaft was sunk two hundred feet; but here, even if the mine had proved rich, the water would have presented serious difficulties, for after getting down a hundred and twenty feet it began to appear, and at a hundred and fifty it occasioned delay and inconvenience. Forty years ago the top of the shaft had been covered with planks and clay to prevent accident. Long ago the machinery and wooden engine-house and tool-house had been carried away, and now the site of the head of the shaft was indistinguishable from the other bramble-grown parts of the sloping cliff over the Black Rock. This head of the mine was always carefully avoided by the inhabitants, for every one said some day or other the planks were sure to give way and fall to the bottom. It was of no interest whatever to visitors, for nothing was to be seen, and a landslip had destroyed the rude road long ago made to it. It was on the right-hand side of one looking seaward.

On this inside of the bay of stone ran downwards the path leading to the great table below. It was a natural path almost the whole way. Art of the simplest kind had cut a little here and filled up a little there, and levelled a little in another place, but the lion's share of the work had been found ready to man's hand. There was no attempt at road-making, or attaining to a surface. Those were luxuries of civilisation: this was a work of rough art and benignant nature.

As one faced the sea, the path crossed over from left to right, then from right to left, and finally from left to right. Standing on the cliff at the middle point of the bay, and looking down at the broad expanse of slanting rock, only two things caught the eye, when the dimensions, the colour, and conformation had been taken in. Directly in front, and almost in the middle of the Rock, rose the apex of what has been likened to the shell of a barnacle. It was not more than ten feet above the level of the Rock, twenty feet from its centre, and was part of the Rock itself.

In a direct line with the apex, and about half-way between it and the outer rim of the Rock, there is a black spot which, upon closer inspection, proves to be a hole of some kind. At the distance it is impossible to perceive any more.

Towards this hole O'Hanlon pointed his arm, and said to O'Brien:

"There's the Hole. You know it well enough."

"Of course. But you could not recognise him so far off," said O'Brien, shading his eyes to look.

"No; but I told you I saw him in here quite close;" and he pointed. "He or it went on without hesitation, and then jumped in. He or it, whichever you prefer, O'Brien, went in as sure as I have a head on me. Either that or I am going mad."

O'Brien thought awhile in silence, with his hand on his chin and his eyes turned on the bleak, dreary waste of stone and water before him.

"O'Hanlon, you're not afraid to risk seeing anything--that thing again?" he asked at length--adding, "I want to have a look at the place."

The other hesitated a little before he drew himself up, and said:

"No. I may as well face it and be sure of the worst--be certain whether I am to end my days in a lunatic asylum or not."

The two men descended to the Black Rock.