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.
“I was saving it for you,” Le Cagot explained.
“An impulse toward fair play?”
“Exactly.”
There was something very wrong here. Basque to the bone though he was, Le Cagot had been educated in France, and the concept of fair play is totally alien to the mentality of the French, a people who have produced generations of aristocrats, but not a single gentleman; a culture in which the legal substitutes for the fair; a language in which the only word for fair play is the borrowed English.
Still, there was no point in standing there and letting the floor of that final Wine Cellar go virgin. Hel looked down, scanning for the best holds.
…Wait a minute! That splash. Le Cagot had fallen into water. Where was it?
Hel carefully lowered his boot into the Wine Cellar. A few centimeters down, it broke the surface of a pool so clear it appeared to be air. The features of the rock below were so sharp that no one would suspect they were under water.
“You bastard,” Hel whispered. Then he laughed. “And you climbed right down into it, didn’t you?”
The instant he pulled up his boot, the ripples disappeared from the surface, sucked flat by a strong siphon action below. Hel knelt at the side of the sump and examined it with fascination. The surface was not still at all; it was drawn tight and smooth by the powerful current below. Indeed, it bowed slightly, and when he put in his finger, there was a strong tug and a wake of eddy patterns behind it. He could make out a triangular opening down at the bottom of the sump which must be the outflow of the river. He had met trick pools like these before in caves, pools into which the water entered without bubbles to mark its current, the water so purified of those minerals and microorganisms that give it its tint of color.
Hel examined the walls of their small chamber for signs of water line. Obviously, the outflow through that triangular pipe down there had to be fairly constant, while the volume of the underground river varied with rainfall and seep water. This whole chamber, and that marl chute behind them acted as a kind of cistern that accepted the difference between inflow and outflow. That would account for marl appearing this far underground. There were doubtless times when this chamber in which they sat was full of water which backed up through the long chute. Indeed, upon rare occasions of heavy rain, the waterfall back there probably dropped into a shallow lake that filled the floor of Zazpiak Cavern. That would explain the stubbiness of the stalagmites in that diamond cave. If they had arrived at some other time, say a week after heavy rains had seeped down, they might have found their journey ending in Zazpiak Cavern. They had planned all along to consider a scuba exploration to the outfall in some future run, should the timing on the dye test prove practicable. But if they had been stopped by a shallow lake in the cavern above, it would have been unlikely that Hel would ever find that marl chute under water, swim all the way down it, locate this Wine Cellar sump, pass out through the triangular opening, and make it through that powerful current to the outfall. They were lucky to have made their descent after a long dry spell.