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.
“Well?” Le Cagot said, looking at his watch. “Shall we drop the dye in?”
“What time is it?”
“A little before eleven.”
“Let’s wait for straight up. It’ll make calculation easier.” Hel looked down through the invisible pane of water. It was difficult to believe that there at the bottom, among those clear features of the floor, a current of great force was rushing, sucking. “I wish I knew two things,” he said.
“Only two?”
“I wish I knew how fast that water was moving. And I wish I knew if that triangular pipe was clear.”
“Let’s say we get a good timing—say ten minutes—are you going to try swimming it next time we come down?”
“Of course. Even with fifteen minutes.”
Le Cagot shook his head. “That’s a lot of line, Niko. Fifteen minutes through a pipe like that is a lot of line for me to haul you back against the current if you run into trouble. No, I don’t think so. Ten minutes is maximum. If it’s longer than that, we should let it go. It’s not so bad to leave a few of Nature’s mysteries virgin.”
Le Cagot was right, of course.
“You have any bread in your pack?” Hel asked.
“What are you going to do?”
“Cast it upon the waters.”
Le Cagot tossed over a cut of his flute baguette; Hel set it gently on the surface of the sump water and watched its motion. It sank slowly, seeming to fall in slow motion through clear air, as it pulsed and vibrated with unseen eddies. It was an unreal and eerie sight, and the two men watched it fascinated. Then suddenly, like magic, it was gone. It had touched the current down there and had been snatched into the pipe faster than the eye could follow.
Le Cagot whistled under his breath. “I don’t know, Niko. That looks like a bad thing.”
But already Hel was making preliminary decisions. He would have to enter the pipe feet first with no fins because it would be suicidal to rush head first through that triangular pipe, in case be met a choking boulder inside there. That could be a nasty knock. Then too, he would want to be head first coming out if it was not a go, so he could help Le Cagot’s weight on the safety line by pushing with his feet.
“I don’t like it, Niko. That little hole there could kill your ass and, what is worse, reduce the number of my admirers by one. And remember, dying is a serious business. If a man dies with a sin on his soul, he goes to Spain.”
“We have a couple of weeks to think it over. After we get out, we’ll talk about it and see if it’s worth dragging scuba gear down here. For all we know, the dye test will tell us the pipe’s too long for a try. What time is it?”
“Coming up to the hour.”
“Let’s drop off the dye then.”
The fluorescein dye they had carried down was in two-kilo bags. Hel tugged them out of their packs, and Le Cagot cut off the corners and lined them along the edge of the Wine Cellar sump. When the second hand swept to twelve, they pushed them all in. Bright green smoke seeped from the cuts as the bags dropped through the crystal water. Two of them disappeared instantly through the triangular pipe, but the other two lay on the bottom, their smoking streams of color rushing horizontally toward the pipe until the nearly empty bags were snatched away by the current. Three seconds later, the water was clear and still again.