Some two hours and five hundred meters later they had crossed enough of the Chaos to be able to see the far end of the cave where the roof sloped down to join the tangle of jagged young fall stone. During the past half-hour, a sound had grown around them, emerging so slowly out of the background ambience of gurgle and hiss far below that they didn't notice it until they stopped to rest and chart their progress. The thousand strands of the stream below were weaving tighter and tighter together, and the noise that filled the cavern was compounded of a full range of notes from thin cymbal hiss to basso tympany. It was a waterfall, a big waterfall somewhere behind that meeting of roof and rubble that seemed to block off the cave.

  For more than an hour, they picked back and forth along the rubble wall, squeezing into crevices and triangular tents formed of slabs weighing tons, but they could find no way through the tangle. There were no boulders at this newer end of the Chaos, only raw young slab, many of which were the size of village frontons, some standing on end, some flat, some tilted at unlikely angles, some jetting out over voids for three-fourths of their length, held up by the cantilevering weight of another slab. And all the while, the rich roar of the waterfall beyond this infall lured them to find a way through.

  "Let's rest and collect ourselves!" Le Cagot shouted over the noise, as he sat on a small fragment of slab, tugged off his pack, and pawed around inside for a meal of hardtack, cheese, and xoritzo. "Aren't you hungry?"

  Hel shook his head. He was scratching away at his notebook, making bold estimates of direction and even vaguer guesses of slope, as the clinometer of his Brunton compass had been useless in the wilderness of the Chaos.

  "Could that be the outfall behind the wall?" Le Cagot asked.

  "I don't think so. We're not much more than halfway to the Torrent of Holçarté, and we must still be a couple of hundred meters too high."

  "And we can't even get down to the water to dump the dye in. What a nuisance this wall is! What's worse, we just ran out of cheese. Where are you going?"

  Hel had dropped off his pack and was beginning a free climb of the wall. "I'm going to take a look at the tip of the heap."

  "Try a little to your left!"

  "Why? Do you see something there?"

  "No. But I'm sitting right in the line of your fall, and I'm too comfortable to move."

  They had not given much thought to trying the top of the slab heap because, even if there was a way to squeeze through, it would bring them out directly above the waterfall, and it would probably be impossible to pass through that roaring cascade. But the base and flanks of the clog had produced no way through, so the tip was all that was left.

  Half an hour later, Le Cagot heard a sound above him. He tilted back his head to direct the beam of his lamp toward it. Hel was climbing back down in the dark. When he reached the slab, he slumped down to a sitting position, then lay back on his pack, one arm over his face. He was worn out and panting with effort, and the lens of his helmet lamp was cracked from a fall.

  "You're sure you won't have anything to eat?" Le Cagot asked.

  His eyes closed, his chest heaving with great gulps of air, sweat running down his face and chest despite the damp cold of the cave, Hel responded to his companion's grim sense of humor by making the Basque version of the universal hand language of animosity: he tucked his thumb into his fist and offered it to Le Cagot. Then he let the fist fall and lay there panting. His attempts to swallow were painful, the dryness in his throat was sharp-edged. Le Cagot passed his xahako over, and Hel drank greedily, beginning with the tip touching his teeth, because he had no light, then pulling it farther away and directing the thin jet of wine to the back of his throat by feel. He kept pressure on the sac, swallowing each time the back of his throat filled, drinking for so long that Le Cagot began to worry about his wine.

  "Well?" Le Cagot asked grudgingly. "Did you find a way through?"

  Hel grinned and nodded.

  "Where did you come out?"

  "Dead center above the waterfall."

  "Shit!"

  "No, I think there's a way around to the right, down through the spray."

  "Did you try it?"

  Hel shrugged and pointed to the broken helmet lens. "But I couldn't make it alone. I'll need you to protect me from above. There's a good belaying stance."

  "You shouldn't have risked trying. Niko. One of these days you'll kill yourself, then you'll be sorry."

  When he had wriggled through the mad network of cracks that brought him out beside Hel on a narrow ledge directly above the roaring waterfall, Le Cagot was exuberant with wonder. It was a long drop, and the mist rose through the windless air, back up the column of water, boiling all about them like a steam bath with a temperature of 40°. All they could see through the mist was the head of the falls below and a few meters of slimy rock to the sides of they ledge. Hel led the way to the right, where the ledge narrowed to a few centimeters, but continued around the shoulder of the cave opening. It was a worn, rounded ledge, obviously a former lip of the waterfall. The cacophonous crash of the falls made sign language their only means of communication as Hel indicated to Le Cagot the "good" belaying stance he had found, an outcrop of rock into which Le Cagot had to squeeze himself with difficulty and pay out the defending line around Hel's waist as he worked his way down the edge of the falls. The natural line of descent would bring him through the mist, through the column of water, and—it was to be hoped—behind it. Le Cagot grumbled about this "good" stance as he fixed his body into the wedge and drove a covering piton into the limestone above him, complaining that a piton in limestone is largely a psychological decoration.

  Hel began his descent, stopping each time he found the coincidence of a foothold for himself and a crack in the rock to drive in a piton and thread his line through the carabiner. Fortunately, the rock was still well-toothed and offered finger- and toeholds; the change in the falls course had been fairly recent, and it had not had time to wear all the ledge smooth. The greatest problem was with the line overhead. By the time he had descended twenty meters and had laced the line through eight carabiners, it took dangerous effort to tug slack against the heavy friction of the soaked rope through so many snap links; the effort of pulling on the line lifted his body partially out of his footholds. And this weakening of his stance occurred, of course, just when Le Cagot was paying out line from above and was, therefore, least able to hold him, should he slip.

  He inched down through the sheath of mist until the oily black-and-silver sheet of the waterfall was only a foot from his helmet lamp, and there he paused and collected himself for the diciest moment of the descent.

  First he would have to establish a cluster of pitons, so that he could work independently of Le Cagot, who might blindly resist on the line and arrest Hel while he was under the falls, blinded by the shaft of water, feeling for holds he could not see. And he would be taking the weight of the falling water on his back and shoulders. He had to give himself enough line to move all the way through the cascade, because he would not be able to breathe until he was behind it. On the other hand, the more line he gave himself, the greater his drop would be if the water knocked him off. He decided to give himself about three meters of slack. He would have liked more to avoid the possibility of coming to the end of his slack while still under the column of water, but his judgment told him that three meters was the maximum length that would swing him back out of the line of the falls, should he fall and knock himself out for long enough to drown, if he was hanging in the falls.

  Hel edged to the face of the metallic, glittering sheet of water until it was only inches away from his face, and soon he began to have the vertigo sensation that the water was standing still, and his body rising through the roar and the mist. He reached into the face of the falls, which split in a heavy, throbbing bracelet around his wrist, and felt around for the deepest handhold he could find. His fingers wriggled their way into a sharp little crack, unseen behind the water. The hold was lower than he would have wished, because he knew the weight of the water on his back would force him down, and the best handhold would have been high, so the weight would have jammed his fingers in even tighter. But it was the only crack he could find, and his shoulder was beginning to tire from the pounding of the water on his outstretched arm. He took several deep breaths, fully exhaling each one because he knew that it is more the buildup of carbon dioxide in the lungs than the lack of oxygen that forces a man to gasp for air. The last breath he took deeply, stretching his diaphragm to its full. Then he let a third of it out, and he swung into the falls.

  It was almost comic, and surely anticlimactic.

  The sheet of falling water was less than twenty centimeters thick, and the same movement that swung him into it sent him through and behind the cascade, where he found himself on a good ledge below which was a book corner piled with rubble so easy that a healthy child could make the climb down.

  It was so obvious a go that, there was no point in testing it, so Hel broke back through the sheet of water and scrambled up to Le Cagot's perch where, shouting over the din of the falls into Beñat's ear, their helmets clicking together occasionally, he explained the happy situation. They decided to leave the line in place to facilitate the return, and down they went one after the other, until they were at the base of the rubble-packed book corner.

  It was a peculiar phenomenon that, once they were behind the silver-black sheet of the falls, they could speak in almost normal volume, as the curtain of water seemed to block out sound, and it was quieter behind the falls than without. As they descended, the fails slowly broke up as a great quantity of its water spun off in the mist, and the weight of the cascade at the bottom was considerably less than it was above. Its mass was diffused, and passing through it was more like going through a torrential rainfall than a waterfall. They advanced cautiously through the blinding, frigid steam, over a slick rock floor scrubbed clean of rubble. As they pressed on, the mists thinned until they found themselves in the clear dark air, the noise of the falls receding behind them. They paused and looked around. It was beautiful, a diamond cave of more human dimensions than the awful Le Cagot's Chaos; a tourist cave, far beyond the access capacities of any tourist.

  Although it was wasteful, their curiosity impelled them to scratch off another magnesium flare.

  Breathtakingly beautiful. Behind them, billowing clouds of mist churning lazily in the suction of the falling water. All around and above them, wet and dripping, the walls were encrusted with aragonite crystals that glittered as Le Cagot moved the flare back and forth. Along the north wall, a frozen waterfall of flowstone oozed down the side and puddled like ossified taffy. To the east, receding and overlapping curtains of calcite drapery, delicate and razor-sharp, seemed to ripple in an unfelt spelean wind. Close to the walls, thickets of slender crystal stalactites pointed down toward stumpy stalagmites, and here and there the forest was dominated by a thick column formed by the union of these patient speleotherns.

  They did not speak until the glare sputtered orange and went out, and the glitter of the walls was replaced by dancing dots of light in their eyes as they dilated to accommodate the relatively feeble helmet lamps. Le Cagot's voice was uncharacteristically hushed when he said, "We shall call this Zazpiak Bat Cave."

  Hel nodded. Zazpiak bat: "Out of seven, let there be one," the motto of those who sought to unite the seven Basque provinces into a Trans-Pyrenean republic. An impractical dream, neither likely nor desirable, but a useful focus for the activities of men who choose romantic danger over safe boredom, men who are capable of being cruel and stupid, but never small or cowardly. And it was right that the cuckoo-land dream of a Basque nation be represented by a fairyland cave that was all but inaccessible.

  He squatted down and made a rough measurement back to the top of the waterfall with his clinometer, then he did a bit of mental arithmetic. "We're down almost to the level of the Torrent of Holçarté. The outfall can't be far ahead."

  "Yes," Le Cagot said, "but where is the river? What have you done with it?"

  It was true that the river had disappeared. Broken up by the falls, it had evidently sounded through cracks and fissures and must be running below them somewhere. There were two possibilities. Either it would emerge again within the cave somewhere before them, or the cracks around the base of the waterfall constituted its final swallow before its outfall into the gorge. This latter would be unfortunate, because it would deny them any hope of final conquest by swimming through to the open air and sky. It would also make the long vigil of the Basque lads camped at the outfall pointless.

  Le Cagot took the lead as they advanced through Zazpiak Bat Cavern, as he always did when the going was reasonably easy. They both knew that Nicholai was the better rock tactician; it was not necessary for Le Cagot to admit it, or for Hel to accent it. The lead simply changed automatically with the nature of a cave's features. Hel led through shafts, down faces, around cornices; while Le Cagot led as they entered caves and dramatic features, which he therefore "discovered" and named.

  As he led, Le Cagot was testing his voice in the cave, singing one of those whining, atonic Basque songs that demonstrate the race's ability to withstand aesthetic pain. The song contained that uniquely Basque onomatopoeia that goes beyond imitations of sounds, to imitations of emotional states. In the refrain of Le Cagot's song, work was being done sloppily (kirrimarra) by a man in confused haste (tarrapatakan).

  He stopped singing when he approached the end of the diamond cave and stood before a broad, low-roofed gallery that opened out like a black, toothless grin. Indeed, it held a joke.

  Le Cagot directed his lamp down the passage. The slope increased slightly, but it was no more than 15°, and there was enough overhead space for a man to stand erect. It was an avenue, a veritable boulevard! And yet more interesting, it was probably the last feature of the cave system. He stepped forward... and fell with a clatter of gear.

  The floor of the passage was thickly coated with clay marl, as slick and filthy as axle grease and flat on his back, Le Cagot was slipping down the incline, not moving very fast at first, but absolutely helpless to arrest his slide. He cursed and pawed around for a hold, but everything was coated with the slimy mess, and there were no boulders or outcroppings to cling to. His struggling did no more than turn him around so that he was going down backward, half-sitting, helpless, furious, and risible. His slide began to pick up speed. From back on the edge of the marl shaft, Hel watched the helmet light grow smaller as it receded, turning slowly like the beam of a lighthouse. There was nothing he could do. The situation was basically comic, but if there was a cliff at the end of the passage...

  There was no cliff at the end of the passage. Hel had never known a marl chute at this depth. At a good distance away, perhaps sixty meters, the light stopped moving. There was no sound, no call for help. Hel feared that Le Cagot had been bashed against the side of the passage and was lying there broken up.

  Then came a sound up through the passage, Le Cagot's voice roaring with fury and outrage, the words indistinct because of the covering reverberations, but carrying the tonalities of wounded dignity. One phrase in the echoing outpour was decipherable: "...by the Perforated Balls of Saint Sebastian!"

  So Le Cagot was unhurt. The situation might even be funny, were it not that their only coil of rope had gone down with him, and not even that ox of Urt could throw a coil of line sixty meters uphill.

  Hel blew out a deep sigh. He would have to go back through Zazpiak Bat Cavern, through the base of the waterfall, up the rubble corner, back out through the falls, and up that dicy climb through icy mists to retrieve the line they had left in place to ease their retreat. The thought of it made him weary.

  But... He tugged off his pack. No point carrying it with him. He called down the marl passage, spacing his words out so they would be understood through the muffling reverberations.

  "I'm... going... after... line!"

  The dot of light below moved. Le Cagot was standing up. "Why... don't... you... do... that!" came the call back. Suddenly the light disappeared, and there was the echoing sound of a splash, followed by a medley of angry roaring, scrambling, sputtering, and swearing. Then the light reappeared.

  Hel's laughter filled both the passage and the cave. Le Cagot had evidently fallen into the river which must have come back to the surface down there. What a beginner's stunt!

  Le Cagot's voice echoed back up the marl chute: "I... may... kill... you... when... you... get... down... here!"

  Hel laughed again and set off back to the lip of the falls.

  Three-quarters of an hour later, he was back at the head of the marl chute, fixing the line into a healthy crack by means of a choke nut.

  Hel tried at first to take a rope-controlled glissade on his feet, but that was not on. The marl was too slimy. Almost at once he found himself on his butt, slipping down feet first, a gooey prow bone of black marl building up at his crotch and oozing back over his hip. It was nasty stuff, an ignoble obstacle, formidable enough but lacking the clean dignity of a cave's good challenges: cliffs and rotten rock, vertical shafts and dicy siphons. It was a mosquito of a problem, stupid and irritating, the overcoming of which brought no glory. Marl chutes are despised by all cavers who have mucked about in them.

  When Hel glissed silently to his side, Le Cagot was sitting on a smooth slab, finishing off a hardtack biscuit and a cut of xoritzo. He ignored Hel's approach, still sulky over his own undignified descent, and dripping wet from his dunking.

  Hel looked around. No doubt of it, this was the end of the cave system. The chamber was the size of a small house, or of one of the reception rooms of his château at Etchebar. Evidently, it was sometimes filled with water—the walls were smooth, and the floor was free of rubble. The slab on which Le Cagot was taking his lunch covered two-thirds of the floor, and in the distant corner there was a neat cubic depression about five meters on each edge—a regular "wine cellar" of a sump constituting the lowest point of the entire cave system. Hel went to the edge of the Wine Cellar and directed his beam down. The sides were smooth, but it looked to be a fairly easy corner climb, and he wondered why Le Cagot hadn't climbed down to be the first man to the end of the cave.