With these four beams we formed a square, placing them on their edges, end to end. At each corner of the square we lashed the ends together firmly with strips of hide. It was both firm and flexible after we had lashed the corners over and over with the strips, that there might be no play under the strain of the current.

Over this framework we stretched the large piece of hide so that the ends met on top, near the middle. The bottom was thus absolutely watertight. We folded the corners in and caught them up with strips over the top. Then, with longer strips, we fastened up the sides, pa.s.sing the strips back and forth across the top, from side to side, having first similarly secured the two ends. As a final precaution, we pa.s.sed broader strips around both top and bottom, lashing them together in the center of the top. And there was our raft, twelve feet square, over a foot deep, water-tight as a town drunkard, and weighing not more than a hundred pounds. It has taken me two minutes to tell it; it took us two weeks to do it.

But we discovered immediately that the four beams on the sides and ends were not enough, for Desiree's weight alone caused the skin to sag clear through in the center, though we had stretched it as tightly as possible. We were forced to unlash all the strips running from side to side and insert supports, made of smaller bones, across the middle each way. These we reinforced on their ends with the thickest hide we could find, that they might not puncture the bottom. After that it was fairly firm; though its sea-worthiness was not improved, it was much easier to navigate than it would have been before.

For oars we took the lower ends of the backbones of the two smaller fish and covered them with hide. They were about five feet long and quite heavy; but we intended to use them more for the purpose of steering than for propulsion. The current of the stream would attend to that for us.

Near the center of the raft we arranged a pile of the skins of the water-pigs for Desiree; a seat by no means uncomfortable. The strips which ran back and forth across the top afforded a hold as security against the tossing of the craft; but for her feet we arranged two other strips to pa.s.s over her ankles what time she rested. This was an extreme precaution, for we did not expect the journey to be a long one.

Finally we loaded on our provisions--about thirty pounds of the meat of the fish and water-pigs, wrapping it securely in two or three of the skins and strapping them firmly to the top.

"And now," said I, testing the strips on the corners for the last time, "all we need is a name for her and a bottle of wine."

"And a homeward-bound pennant," put in Harry.

"The name is easy enough," said Desiree. "I hereby christen her Clarte du Soleil."

"Which means?" asked Harry, whose French came only in spots.

"Sunshine," I told him. "Presumably after the glorious King of the Incas, who calls himself the Child of the Sun. But it's a good name.

May Heaven grant that it takes us there!"

"I think we ought to take more grub," said Harry--an observation which he had made not less than fifty times in the preceding fifty minutes.

He received no support and grumbled to himself something about the horrible waste of leaving so much behind.

Why it was I don't know, but we were fully persuaded that we were about to say good-by forever to this underground world and its dangers.

Somehow, we had coaxed ourselves into the belief that success was certain; it was as though we had seen the sunlight streaming in from the farther end of the arched tunnel into which the stream disappeared.

There was an a.s.surance about the words of each that strengthened this feeling in the others, and hope had shut out all thought of failure as we prepared to launch our craft.

It took us some time to get it to the edge of the water, though it was close by, for we handled it with extreme care, that it might not be torn on the rocks. Altogether, with the provisions, it weighed close to one hundred and fifty pounds.

We were by no means sure that the thing would carry us, and when once we had reached the water we forgot caution in our haste to try it. We held it at the edge while Desiree arranged herself on the pile of skins. The spears lay across at her feet, strapped down for security.

Harry stepped across to the farther edge of the raft.

"Ready!" he called, and I shoved off, wading behind. When the water was up to my knees I climbed aboard and picked up my oar.

"By all the nine G.o.ds, look at her!" cried Harry in huge delight. "She takes about three inches! Man, she'd carry an army!"

"Allons!" cried Desiree, with gay laughter. "C'est Perfection!"

"Couldn't be better," I agreed; "but watch yourself, Hal. When we get into the current things are going to begin to happen. If it weren't for the beastly darkness 'twould be easy enough. As it is, one little rock the size of your head could send us to the bottom."

We were still near the bank, working our way out slowly. Harry and I had to maintain positions equidistant from the center in order to keep the raft balanced; hence I had to push her out alone.

Considering her bulk, she answered to the oar very well.

Another five minutes and we were near the middle of the stream. At that point there was but little current and we drifted slowly. Harry went to the bow, while I took up a position on the stern--if I may use such terms for such a craft--directly behind Desiree. We figured that we were then about a mile from the Point where the stream left the cavern.

Gradually, as the stream narrowed, the strength of the current increased. Still it was smooth, and the raft sailed along without a tremor. Once or twice, caught by some trick of the current, she turned half round, poking her nose ahead, but she soon righted herself.

The water began to curl up on the sides as we were carried more and more swiftly onward, with a low murmur that was music to us. The stream became so narrow that we could see the bank on either side, though dimly, and I knew we were approaching the exit.

I called to Harry: "Keep her off to the right as we make the turn!" and he answered: "Aye, aye, sir!" with a wave of the hand. This, at least, was action with a purpose.

Another minute and we saw the arch directly ahead of us, round a bend in the stream. The strength of the current carried us toward the off bank, but we plied our oars desperately and well, and managed to keep fairly well in to the end of the curve.

We missed the wall of the tunnel--black, grim rock that would have dashed out our brains--by about ten feet, and were swept forward under the arch, on our way--so we thought--to the land of sunshine.

Chapter XX.

AN INCA SPEAR.

Here I might most appropriately insert a paragraph on the vanity of human wishes and endeavor. But events, they say, speak for themselves; and still, for my own part, I prefer the philosopher to the historian.

Mental digestion is a wearisome task; you are welcome to it.

To the story. As I have said, we missed the wall of the tunnel by a scant ten feet, and we kept on missing it. Once under the arch, our raft developed a most stubborn inclination to b.u.mp up against the rocky banks instead of staying properly in the middle of the current, as it should.

First to one side, then to the other, it swung, while Harry and I kept it off with our oars, often missing a collision by inches. But at least the banks were smooth and level, and as long as the stream itself remained clear of obstruction there was but little real danger.

The current was not nearly so swift as I had expected it would be. In the semidarkness it was difficult to calculate our rate of speed, but I judged that we were moving at about six or seven miles an hour.

We had gone perhaps three miles when we came to a sharp bend in the stream, to the left, almost at a right angle. Harry, at the bow, was supposed to be on the lookout, but he failed to see it until we were already caught in its whirl.

Then he gave a cry of alarm, and together we swung the raft to the left, avoiding the right bank of the curve by less than a foot. Once safely past, I sent Harry to the stern and took the bow myself, which brought down upon him a deal of keen banter from Desiree.

There the tunnel widened, and the raft began to glide easily onward, without any of its sudden dashes to right or left. I rested on my oar, gazing intently ahead; at the best I could make out the walls a hundred yards ahead, and but dimly. All was silence, save the gentle swish of the water against the sides of the raft and the patter of Harry's oar dipping idly on one side or the other.

Suddenly Desiree's voice came through the silence, soft and very low:

"Pendant une anne' toute entiere, Le regiment na Pas r'paru.

Au Ministere de la Guerre On le r'porta comme perdu.

"On se r'noncait a r'trouver sa trace, Quand un matin subitement, On le vit r'paraitre sur la place, L'Colonel toujours en avant."

I waited until the last note had died away in the darkness.

"Are those your thoughts?" I asked then, half turning.

"No," said Desiree, "but I want to kill my thoughts. As for them--"

She hesitated, and after a short pause her voice again broke into melody:

"Fresh as the first beam glittering on a sail That brings our friends up from the underworld; Sad as the last which reddens over one That sinks with all we love below the verge; So sad, so fresh, the days that are no more."