Late in the afternoon of the next day the two boys dropped off the train at a little station in the desert. There was no hotel among the houses along the track but they were lucky enough to find a room over the general store in which to sleep.  
As they had so little time in which to accomplish their plan every minute was valuable, so, as soon as they had provided for the night, they started out to find some sort of a boat to carry them on their adventure.
 
The of the store, who was also their host, directed them to a man he thought might have one. The latter, a rancher in a small way, was rather as to the boat’s being in a condition to . “It’s down by the river,” he said. “Been down there pretty nigh a year, too, ef somebody hain’t swiped it. Take ye down to look at it in the mornin’. Ef you’re aimin’ to commit suicide tryin’ to get through the , it ought to be jest the thing for you. ’Twas built by a party what aimed to try the but got cold feet before they tackled it. They give it to me, so ef you’re willin’ to pay about ten dollars, you’re welcome to it.”
 
This sounded good to the boys and they went back to the store feeling in luck. They had brought with them the air which Jerry had advised buying at the , as it would give them a dry bed no matter where they might be forced to camp. They added to this before going to bed by buying provisions from the storekeeper, endeavoring to get as much food in as little bulk as possible. At last their preparations for the trip were complete, and they went to bed anxious for the morning, and hoping that the boat would prove what they wanted.
 
In order not to lose any time they packed the dunnage they expected to take into two loads and carried it with them when they went down the next morning to inspect the boat. It was a long way from the little town to the river and their spirits as the loads grew heavier. However, they found the boat covered over by brushwood and some old sail-cloth, and when its owner pulled it out into the open they were much encouraged. The boat was about sixteen feet long, high at both ends with water-tight .
 
“If it only doesn’t leak,” said Jerry, “it will be all right.”
 
They pulled it into the water and watched with bated breath. It leaked badly and Jerry was disgusted. Bob, however, knowing more about boats than his companion, realized that the long time the boat had been out of water had caused the strips to contract and in all probability a few hours’ soaking would make them tight. Bob had insisted on putting the boat into the water before paying for it and as the water came in more slowly after a few minutes, he was satisfied. They paid the man and he went off after wishing them a rather pessimistic farewell.
 
“I reckon I’ve seen as many as twenty danged fools try this stunt and I’ve never heard of any of them comin’ out the other end—that is, comin’ out breathin’. It’s a pity when the two of you air so young. I’ll be right glad to hear from you ef you do get through, seein’ as how it was my boat. Danged ef I figger I’ll hear, howsomever. Good-bye to you.”
 
With this he started back up the trail, shaking his head. Jerry suggested they make camp and wait until the boat was water-tight. This seemed a good suggestion, so they built a fire and made some coffee. In the afternoon Bob baled out the water that was in the boat and after watching carefully for half an hour found that no more water had come in.
 
“She’s all right,” he called to Jerry, who was building a lean-to for the night.
 
“All right,” answered the other, “pull her up on the bank and we’ll stow away everything that we don’t need for the night. We can leave just as soon as it is light to-morrow. We wouldn’t get far enough along to pay us for starting now.”
 
The boat easily carried all the things they had brought. Jerry took particular care in stowing away a box which he had hung onto jealously since they started. It was rather a mysterious looking case about which he had volunteered no information. Up to this time Bob had not questioned him, although he had wondered what was in it. However, as Jerry reserved the safest and dryest part of the boat for it Bob ventured to ask what it was.
 
“Light ,” said Jerry. “We will need it to make sure that a road into the canyon is possible. What might seem quite possible to the eye, is often no use at all. I thought we’d better make sure.”
 
Bob was interested. He had read of and knew in a general way what use engineers made of and levels but up to this time he had not had an opportunity to see them in actual service.
 
“If we’ve got to use it, Jerry,” he suggested, “don’t you think you had better tell me something about it now while we’ve got a chance? Then I’ll be of more use when we get down to the canyon.”
 
“All right,” said Jerry rather ungraciously. “But you’ll soon catch on to it when we start work. You’ll have to.”
 
At the same time he took the case out of the boat and opened it. It was a beautiful little instrument, weighing hardly twenty-five pounds. It stood on telescopic legs of steel. Jerry showed Bob how to set it up and to manipulate the four screws by which it was made level. Then he showed him how to focus the telescope and all the other elementary things. After a little practice Bob felt competent to give Jerry what help he would need.
 
“Gee whiz, it’s interesting,” said Bob at last, when Jerry put the fascinating instrument away.
 
“After you’ve carried one for about five years you won’t think it so interesting,” returned Jerry, suddenly remembering that he was a .
 
The night came down cold. The boys were glad to bundle up into their sleeping bags and get what rest they could. The novelty and excitement could keep Bob awake for only a little while, for the danger into which he was headed did not worry him for a moment, and he was very tired. He wanted adventure and he was going to have it. Only one thing him at all, and that was the thought of his father. But before he had left the hotel at the Grand Canyon he had written a letter explaining to the older Hazard what he was planning to do. He had, of course, minimized the danger. But, even so, when Mr. Hazard got the letter he was very much upset and had an impulse to get on the next train and bring his boy back to civilization, if he still had a boy to bring back.
 
Jerry was first awake in the morning. He roused Bob but not until he had a fire going and the coffee-pot singing merrily. Bob got up and, slipping off his clothes, dived into the river. The water was cold but not unpleasantly so. Jerry looked at him for a minute and laughed as he came out dripping.
 
“You won’t need to take a bath after this. If you don’t have about five unexpected ones during the day I miss my guess.”
 
Bob laughed. “Well, water won’t hurt us. You’re sort of a grouch, aren’t you, Jerry?” he said pleasantly. It was a tactless thing to say, for the other boy shut up like a and except as it was absolutely necessary he gave no openings for further conversation.
 
“Jolly sort of trip I’m going to have,” thought Bob, “if Jerry is going to keep up this sort of thing. I ought never to have said he was a grouch, though.”
 
After breakfast they rolled up their mattress and stowed away in the boat the things they had used during the night. At last they were ready to start.
 
“We might as well be going,” said Jerry. “Hop in.” He was already at the , which he had tied securely to the oarlocks. The wisdom of this precaution was later to be proved to them. Once Bob was in, Jerry pulled off. He was a fair oarsman and going with the current the boat made good time. At this point the river was broad and, except for the towering hills which rose in the distance, it might have been a peaceful stream of any river. Its calm surface gave no warning of what was to come in the way of rapids and whirlpools. After a bit Bob took the oars and as he had had more experience with boats he made even better time than Jerry had. Turn by turn they went through the morning.
 
It was not long before the rolling hills on either side of the stream gave way to rocky cliffs and deep through which little into the river. The current grew faster and here and there an ugly rock showed its head above the surface, the water rushing by angrily on either side.
 
“Getting a little interesting,” ventured Bob.
 
“This isn’t anything,” Jerry, and then they went on again in silence.
 
About noon they pulled in to a rocky and had some lunch, and after a short rest went on again. Towards the middle of the afternoon, as they were turning a bend in the river, Bob, sitting in the stern, saw what seemed to him to be a mountain cut in half.
 
“That must be it,” he said. “Look, Jerry!”
 
Jerry turned. “You’re right, I guess. It’s the Labyrinth.”
 
“We ought to get there by night. It’s only around the next bend,” Bob ventured.
 
Jerry looked around again and laughed shortly. “We’ll be lucky if we’re there by to-morrow night. That cliff is twenty miles away at least.”
 
Bob was amazed. It looked to be only about a mile away. Jerry must be mistaken. But Jerry was right. Although they had covered a great deal of distance, when it came time to camp for the night the in the mountain seemed as far away as when Bob had first sighted it. Two days later, however, they did reach it. And it was not until the river had them through this giant that they encountered any rapid water. They began to think that the passage of the Labyrinth had been .
 
In the late afternoon of the second day, after they had slipped silently by the towering walls of the canyon which here came down sharply into the river, and had swung around a bend, Jerry sighted the first rough going.
 
“Pull in to shore, Bob,” he said quickly. “We’d better take a look at what’s coming before we tackle it.”
 
Once they made their way as near to the rapids as possible. The water boiled in fury as it rushed by the rocks that opposed its way.
 
“Gee whiz!” ejaculated Bob. “This is worse than anything I’ve tackled before—ever!”
 
Jerry laughed and said, “There’ll be a lot worse than this before we’re through, I’m afraid. This isn’t much. We’ll be able to shoot it all right.”
 
Back in the boat Jerry took the oars, and, helped by the current, drifted swiftly towards the first rapids of the shallow and dangerous passage. Once into the white water they found the going easier than they had expected. After a struggle and a narrow escape or two from on jagged rocks they saw smoother water ahead. But this held a new danger. Here the river made a short bend, and the current, throwing itself against the opposite bank, threatened to dash them against it before they could control their boat.
 
It was a moment. They shot out of the white spray and were headed for the rocky wall. “Quick, Jerry!” yelled Bob. “Pull her ’round.”
 
Jerry used both his arms on the right hand and a moment later, breathless and a little , they came to quieter water.
 
“Like shooting the chutes, isn’t it?” said Bob, putting his feeling into words as soon as he could speak. “Great sport!”
 
Jerry, however, to his oars, betraying his emotion only by the gleam of his eyes. No more rapids of any consequence hindered their way the remainder of the afternoon. It was not until well along the next morning that they came again to anything which really could be called dangerous.
 
The first intimation the boys had of the approaching rapids was the increasing speed of the boat. As they looked ahead the water seemed clear and unbroken, but some current stronger than usual was hurrying them along.
 
“We’re in for it again,” yelled Jerry to Bob, who was rowing. “Back water—hard!”
 
Bob dug in the blades of his oars with all the force he could . The boat lost a little headway but the effort came too late. The current had them in its grasp. A quick rush in the blinding spray and the boys found themselves in the icy water. Bob, however, had kept hold of one of the oars of the overturned boat and he thanked his stars that Jerry had had the to tie it to the oarlock.
 
As soon as he shook the water out of his eyes a glance showed him what had happened. Some freak of nature had left a ledge in the bottom of the river over which the water flowed, making a waterfall of perhaps six or eight feet. So even was the edge of the fall that it had not been visible to them as they came down stream through the first rough water.
 
“All right?” called Bob to Jerry, who had been carried past him by the foam-flecked water.
 
“Sure,” the other . “Just keep drifting and we’ll land on that point down there. I’ll stand by to help beach the boat when you get there.”
 
The boys pulled the boat up on the rocky ledge that Jerry had called a point, where they discovered to their great relief that no great damage had been done. The water-tight compartments had held and their provisions and clothing were quite dry. A few minutes later they were off again, but paddling a little more cautiously this time, for they had experienced the first trick the Labyrinth could play. They would be better prepared for the next.
 
A stretch of good going gave them time for a little reflection. Bob busied himself with thoughts of a possible dam site. It seemed queer to him that Jerry had appeared to take no interest in the canyon for this purpose.
 
“Why haven’t we looked for a place for the dam?” Bob ventured at last. “We’ve passed a lot of places where the canyon walls were narrow.”
 
“No hurry,” answered Jerry. “It’d be too far to tunnel a canal through the mountain right here. The valley we want to is miles farther down. There’s no use bothering our heads about it until we get nearer.”
 
Satisfied, Bob let the matter rest. So far the journey, with the exception of the one upset, had proved rather tame going and both boys were a little surprised that former explorers had found it impossible to make the passage. The boy from the East rather doubted that they would meet any worse obstacles than they had already. But Jerry was more . When Bob ventured that he thought the trip was a cinch, Jerry agreed, with a reservation.
 
“It’s been a cinch so far, but just wait. We’ve not started to get into trouble yet. We’ll get ours all right before we’re through.”
 
Hardly were the words out of his mouth when more trouble ensued. The canyon broadened and instead of the river being confined in a deep, fast-flowing current, it was spread out into a shallow, stream. Several times they grounded, there was so little water covering the sand. Here and there rocks stuck above the water, and in places it was necessary to jump out and push the boat into a deeper part.
 
“It seems to me we’re going to get that trouble right now,” said Bob. “As soon as this narrows a little bit, if it doesn’t get deeper I bet we’ll have rapids with a .”
 
This turned out to be the case, for the water went faster as they proceeded, and instead of the sandy bottom, rocks became more and more numerous, the water rushing by them with angry . Bob had difficulty in keeping the craft from . After narrowly escaping shipwreck between two particularly vicious looking jagged stones he that there was no safety in going on the way they had. Suddenly he had an idea.
 
“The next time we get to a shallow spot, Jerry,” he ordered between strokes, “take hold of the painter and jump out. We must bring the bow up stream.”
 
Jerry saw that Bob must have some good reason for the and without a word took hold of the rope which was fastened to the bow of the light craft and slipped overboard at the first likely spot. Pressing himself against a rock, he held and let the action of the current, helped by Bob’s pulling strongly on one oar, turn the boat’s nose in the direction from which they had come. It was ticklish work in view of the position in which they were placed. But once around he saw what Bob had in mind when he had planned the stunt, for as soon as he was aboard again Bob began rowing against the current. This allowed the boat to go very slowly down stream. In this way he had much more control than merely backing water could give him. Besides he could see for himself what was coming, as in a rowing position he naturally faced the stern.
 
“A good idea,” commented Jerry as Bob, due to the new method of progress, missed hitting a wicked rock.
 
This word of commendation from his comrade pleased Bob immensely. It was the first word of approval he had had from his gloomy chum. “Easier, that’s all!” he answered. But both boys were glad when a new stretch of still water was reached.
 
Just before sundown next day they came to an obstacle which at first sight rather them. As they rounded a bend, the most surprising bit of scenery they had so far encountered flashed before their eyes. The canyon seemed to stop, to have no . It was as if they had come into an amphitheater from which there was no escape. Even the way they had come in was not visible. The point of rocks which had made the bend in the river into the sides of the canyon in such a way as to make it seem that there was no opening at all.
 
“Golly!” almost whispered Bob, by the strangeness of the scene. “I reckon this is why no one came through. There doesn’t seem to be any way to get out—”
 
“There’s got to be a way through,” growled Jerry. “Where does the water go? Must go somewhere; can’t stop here, that’s sure as rain.”
 
“P’r’aps—p’r’aps it goes through a cave,” suggested Bob. “I’ve read about underground rivers, haven’t you?”
 
“Oh, shucks,” said Jerry. “Probably the way out is hidden just like the way we’ve come. Look back. You can’t see how we got in here, can you?”
 
Bob had to admit this was so. “Maybe you’re right. Anyhow, it’s so dark we can’t tell for certain. I think we’d better get ashore somewheres and make camp. We’ll find out about it in the morning.”
 
When they awoke the next morning the rounded of the canyon was flooded with light.
 
“Find your ridge,” invited Bob politely, “the one behind which our river flows on and on and—”
 
“Oh, shut up!” was Jerry’s ungrateful retort. Since he had opened his eyes he had endeavored to find just that thing—with no success. But he would not own up until he had had another long look. But after a while he had to give in.
 
“Looks like you were right,” he said . “The river must go through a tunnel, because it sure comes out on t’other side. This river is part of what goes through the Grand Canyon.”
 
Bob had the good sense not to gloat openly over Jerry’s .
 
“All right,” was all he said. “But let’s find the mouth of the tunnel. up with the grub.”
 
They their coffee and soon cast off, letting the stream carry them gently towards the face of the great . A few minutes later they saw the solution of this mystery. Under the cliff the river flowed swiftly and silently into a dark hole.
 
“Back water,” said Bob. “We’d better explore a little before we start through.”
 
“You don’t mean to go through it, do you?” said Jerry, startled out of his usual calm manner by the way in which the other boy had spoken.
 
“Why not?” returned the other. “It looks like the only way we can go, doesn’t it?”
 
“Yes,” said Jerry, “but—I didn’t figure on anything like this.”
 
“We can’t go back again, can we?” asked Bob. “There doesn’t seem to be anything else to do but to try the tunnel.”
 
His first surprise over, Jerry saw that Bob was right. If they didn’t go through the tunnel they would probably never go anywhere. It would be more than their strength could accomplish to force the boat back through the rapids they had encountered. And even if they could reach the top of the cliffs, Jerry knew that they would die of thirst before they could make their way to civilization.
 
“You’re right, I guess,” he . “We’ve got to do it. Come on, we might as well get it over.”
 
But Bob, who was at the oars, pulled towards the bank. “Just a jiffy, Jerry, I’ve got a . Why couldn’t a dam be built here?”
 
In a flash Jerry saw what Bob meant, and for a second was ashamed that in the excitement he had forgotten the real object of their expedition. They were out to find a place where a dam might be built that would bring the water of life to the desert on the other side of the mountain—and he had forgotten all this when his personal safety was in danger. He looked up at the wall nature had built across the canyon. This time it was not as an obstruction that he saw it but as a possible location for a dam. When the boat touched the shore, he brought out the transit and set it up. Bob waited breathlessly for his decision. At last Jerry took his eye from the telescope.
 
“Yes,” he said slowly, “it looks possible to me. Better’n that, Bob, it looks lucky. Nature has given us a big help if it turns out that it is possible.”
 
“You think my hunch may be right then?” put in Bob, his eyes shining. “P’r’aps this big wall might become part of the dam itself!”
 
“Yep! Here, take a through the telescope and see for yourself. The top of this wall is more’n to the top of the canyon.”
 
Bob his eye to the glass and confirmed his comrade’s statement. “Can’t we take some measurements?” he wanted to know.
 
“Won’t be necessary. We couldn’t climb to the top anyway—”
 
“Then the transit’s no use?”
 
“Except as a telescope. But at that it’s told us a lot. But that was a wonderful hunch of yours, Bob. I guess you must be a born engineer. To put it through we’d have to stop up the mouth of the tunnel into which the river runs. Then extra work on top of the cliff would bring it up to the necessary height.”
 
“I’ll bet a road could be made from the edge of the canyon to the top of the cliff,” asserted Bob confidently, “and what work had to be done here at the river bed could be managed by derricks and cranes from that spot. Don’t you think so?”
 
“It’d be a big saving all right if it could,” exclaimed Jerry at last. “And I believe it will work. There’s only one thing more to find out and that is how long the tunnel is.”
 
“There’s only one way to find out, isn’t there?” said Bob. “That’s to go through it. Are you ready?”
 
Jerry realized that they had wonderful news to bring back to the boss. To find a location was good work, but to find a dam almost ready-made would mean such a saving for the Service that the stunt would be almost unique. It fired his enthusiasm and stilled any fears he might have of the danger to be overcome.
 
“Sure,” he said. “Let’s go to it. If we get through we’ll know what we want to know. If we—we don’t, it doesn’t make much difference, does it, old man?”
 
Bob put out his hand. “We’ll win out, Jerry, and we’ll be proud that we did it. If something should happen—it’s for the Service!”
 
They felt the spirit of pioneers and an immense to the Service and what it stood for. Jerry shook his hand warmly.
 
A moment later the boys were afloat. As they got near to the dark entrance they saw that the jagged rocks which fringed the arch came very near to the water.
 
“We’ll have to feel our way through,” said Bob. “Lie low until we get in and then try to catch hold of the roof. We don’t want to go through too fast.”
 
“All right,” sang out Jerry. “But I wish we had a lantern.”
 
“Keep wishing,” laughed Bob. “That’s about all the good it’ll do you.”
 
The very real danger had shaken Jerry out of his . This is very often the case in moments of real when even bitter enemies are together and become friends during the moments of danger.
 
“Duck!” yelled Jerry.
 
Hardly were the words out of his mouth before the boat and its occupants were into the gloom of the .
 
“Don’t bother about the oars,” said Bob, his voice echoing from the walls of the passage. “It’s too dark for ’em. Try to get a hold on the roof.”
 
It was some moments before their combined efforts to clutch the rocky roof of the tunnel succeeded to bring their boat under control.
 
“Better not let go one hand till you get another hold!” cautioned Jerry. “It’s mighty slippery.”
 
Foot by foot they made their way through the tunnel of . Cold fear clutched at the heart of each boy, for any moment disaster might come in one of a hundred ways—and they couldn’t see it coming!
 
For a time all went well, but soon Jerry said in a whisper—somehow the dark made him whisper rather than speak aloud—“I can’t touch the roof any more, can you?”
 
“No, but it’s all right,” said Bob as cheerfully as he could. “We’ll just have to trust to luck. Sit down and let her rip!”
 
They slid noiselessly through the impenetrable darkness with only the of the water to break the stillness. The very quietness added a terror of its own. There was no way of telling how fast they were going. They could not see the water and only the rush of cold air against their faces told them they were moving at all.
 
“Wonder how much longer it’ll be,” whispered Bob, forcing a little laugh. “Seems like we’ve gone miles!”
 
“I’ve got beyond wondering how far we’ve got to go,” said Jerry . “I just want something to happen. Anything at all would be better than just sitting helpless.”
 
After this attempt at conversation each boy relapsed into his own gloomy thoughts. These were suddenly disturbed, however, for Jerry called out, a note of hope in his voice, “I think I see light ahead!”
 
Bob looked and saw it was so. A little of white appeared in the distance. Rapidly it grew larger. Now the blackness turned to a gray and in the new light the boys saw why it was they had come through without rubbing against the side walls.
 
The tunnel was absolutely straight and could not have been carved more evenly through the mountain by the of man. So swift was the current that the boat had had no choice but to go in a straight line, and so wide was the tunnel that there was slim chance of interference with its walls. The boys were so thankful that they were approaching the end of the cavern and its darkness that neither thought of picking up the oars which were still idly alongside the boat. They sat as if fascinated, watching the opening grow larger and larger.
 
Nearer it came to them until at last with a they were out into the daylight. Blinking in the bright light, their eyes unaccustomed to the sun, they did not realize that a new danger threatened them. It was a long moment before Bob saw what a predicament they were in.
 
“Look out for falls!” he shouted. Jerry turned and saw that they were on the very of a over which the river was flowing. It was a nasty hole they were in. From the noise the water made when it dropped, Jerry was sure it was a long way to the bottom. Besides, he saw in a flash that along its edge of rock stuck up like sentinels. If they were driven against any one of these it would mean instant shipwreck.
 
the boys reached for the oars but a sudden twist in the current swung the light craft broadside to the stream and as it turned the bow grazed a half submerged rock. The violent shock caused Jerry to lose his balance. Before he could so much as move, Bob saw his chum topple overboard, where the current swept him towards the brink.
 
Bob’s first impulse was to jump in after Jerry, but in a flash he realized he could help him a lot more if he could save the boat and pull him to shore. Grabbing the oars, he made a vain effort to stem the boat’s headway by pulling against the stream. He was too late. The current had the craft in its grip.
 
He thrashed the water with the oars, but, in spite of his efforts, the boat was whirled towards what end he could not guess. Just at the brink a sudden cross rip caught the boat and flung it against one of the rocks which the hurrying waters had not been able to wear away. A sickening crash announced the end of the craft that had given such good service. The same jar flung Bob out and a second later he was hurtling through the foam-laden air over the edge of the fall.
 
Luckily for him, the impact which had thrown him out, served to propel him a little to one side of the spot where the boat plunged ahead of him, and to land him in a pool of deep water. If this had not happened and he had crashed into the boat’s , broken bones would have been his portion. As it was, he missed this fate by only a hair’s breadth.
 
After having gone deep into the pool, Bob came to the surface, his lungs bursting. One side of his body was from the impact of his fall on the surface of the water. Aside from this, he was little the worse for his experience.
 
He was far too dazed to try to swim. But the whirlpool below the fall flung him aground and, , he up a rocky shallow out of the water. He lay there, too stupified to move. Then the came that for the moment he was safe. A second afterwards he remembered that Jerry had gone over the fall too. Something must be done and he was the only one to do it. Pulling himself together, he crawled to his knees and looked out over the surging water below the fall. He could see no signs of his chum. He .
 
The fact that Jerry was gone whirled in his head. He must find out where his comrade was. Looking down, he saw something which had escaped his first look. It was a black object bobbing about in an off the main rush of the current. He could not be sure that it was Jerry. His wracked bones told him it was only driftwood—that Jerry was gone—that he could make no further effort. But his pride and determination told him he must go on. It might be Jerry and if he did not make sure he could never forgive himself.
 
Stumbling over the rocks, he started off as fast as he could manage. Half blinded, he slipped off a rock and was plunged into the current. Instinct made him swim and the current him, he approached rapidly the place where he thought he had seen Jerry. Little by little his forced cleared his brain and his determination to go on made him forget his pains.
 
As he swam nearer to the object which was around in the water, it constantly his grasp, but he saw that it was Jerry. It was as if the river was playing tag with him, snatching the thing he wanted out of his reach. Reason told him that Jerry was dead. What was the use of his trying to keep up this endeavor when it was all so useless? But something kept him striving, held him to his aim. He couldn’t give up. With a last despairing lunge, he shot into the eddy and caught his comrade’s shoulder. With infinite pains he swam with his prize to the bank. Safely there, he had only strength to pull it halfway out of the water.
 
He was done, spent for the moment, but the will power which had driven him on and on roused him. He had done this much, he must do the rest even though every muscle in his body rebelled. He dragged the lifeless form of his friend out of the water and managed to lay him face downward over a round rock, letting his head lie low. Then Bob flung himself on Jerry and tried with the weight of his own body to force the water out of the other’s lungs. Only a little success rewarded this maneuver. Next Bob let the other’s limp body roll off onto the ground and, sitting astride of it, worked his chum’s arms up and down to induce breathing. There was no response.
 
Tears of utter streamed down Bob’s face. But he kept on. Up and down, up and down, he pulled the other’s arms. Just as he was about to give in to the utter refusal of his body to go on, he thought he heard a faint sigh from his comrade. This put new strength in his arms and new ability to continue. He was not mistaken. After another moment Jerry again heaved a long sigh and started breathing, jerkily at first, yet breathing. When Bob was sure that there was no mistake, that Jerry was again in the land of the living, he rolled to one side, absolutely all in.
 
It was not long, however, before their strong constitutions asserted themselves. Soon both boys were able to sit up and take stock of what damage had been done. Jerry was first on his feet, pale and a little shaky, but again master of himself.
 
“Was it a close shave?” he asked as Bob sat up.
 
“You bet,” was the heartfelt answer. “I thought you were a goner sure. But where is the boat?”
 
Jerry scanned the river a moment before replying: “She’s not in sight.”
 
“Sunk, do you think?” anxiously Bob. “Seems to me I remember hitting a rock just an instant before—before I did my parachute act.”
 
“I don’t know. Come on and let’s see if it has gone around the bend. At that we’ll never be able to catch up with it unless it’s grounded somewheres.”
 
Without the boat, they would have no provisions. The nature of the country didn’t promise much in the way of , and even if they succeeded in climbing the canyon walls, they would probably starve before they reached civilization. It was a terrifying and each boy realized it . But neither would show to the other the fear that gripped him. Stumbling and weak they made their way over the rocks until they could see around the bend.
 
“Hurray!” called Bob, who was in the lead. “There she is.”
 
When Jerry came up he saw what had called his comrade’s shout. The boat was lying wedged between two rocks on the opposite shore, one end entirely submerged by the rushing stream.
 
“Can you make it?” asked Bob. “We’ll have to swim.”
 
“I guess so,” answered the other. “It’s got to be done.”
 
Without hesitating, Bob slipped into the water and struck out. The current carried him far down the river from the point he was making for, but he reached the other side in safety. Jerry followed and strove manfully, but the accident had taken a good deal of his strength and he was thankful when Bob out and gave him a hand to shore.
 
[77]Their boat was a , they found when they came up to it. The after water-tight was completely stove in. This had caused the stern to sink. Two things, however, were in their favor. The front compartment, in which they had stowed their blankets, extra clothing, matches and the transit, was still intact. Also, as the after compartment had held only their canned eatables, the ducking had not hurt them. Few of the cans had fallen out.
 
“I reckon we’ll have to wait until morning to see what we can do about fixing the boat,” said Bob. “It’s much too dark now. Come on, we’ll light a fire and be as comfortable as we can. We’re sort of inland Robinson Crusoe’s, aren’t we?”