Only an occasional shot still sounded. When it did come the deep grumbling echoes rumbled back and forth between the opposing heights until they died away in softer cadence in the distance.
"How will we go from here, Jack?" questioned George. "Will it be safe to start up the engine while we"re so close by?"
"I was studying that very thing, George," replied the other, "and had about made up my mind that it would be much better for us to repeat what we did before."
"That means push out with the pole, and let the boat float on the current, eh, Jack?"
"After we get a mile or two further down the river we can think of using a little power and increasing our speed. But this is dangerous ground, you know," was what the skipper went on to say.
Buster knew that the time was coming, and very soon now, when they would again be on the move. He was glad of it, and yet at the same time viewed the approaching change of base with fresh anxiety. So many perils seemed to yawn in front of them, and all with ominous aspect.
He stared out upon the darkened river, though, of course, it was little he could see. Still, to Buster just then it was peopled with enemies of every type, men in boats moving around seeking trouble, and ready to strike hard at the first sign of opposition.
Buster found himself between the two horns of a dilemma; he wanted to get away from there, and at the same time hated to incur fresh perils.
As generally happened with him, in the end he decided to put himself entirely in the hands of his three mates and let them settle the matter as they thought fit.
Which was possibly the best thing Buster could have done.
By the time another ten minutes had crept past Jack began to bestir himself.
"Is it time?" asked Buster dubiously.
"The firing seems to have stopped entirely," he was told, "and if that"s the case, the sooner we"re out of here the better."
Of course, there would be Serb sentries posted all along the river bank, unseen in the darkness, but ever vigilant to detect and report anything suspicious that might take place. On the other hand, some of the Austrians might have put out in boats stationed below on purpose, meaning to search for wounded men among the floating fragments of the pontoon bridge.
Once Jack put some of his strength into his work and they could feel the boat gliding away from the shoal water where they had been lying quietly for such a length of time.
Buster drew a long breath, and tried to pierce the gloom by which they were surrounded. If there was anything he hated it was that sense of impending evil, with not the slightest chance to ward it off. Still he got a grip on himself, and determined that if the others could stand it he must do the same.
CHAPTER XX
A RESCUE BY THE WAY
As soon as they were out a short distance from the sh.o.r.e the ever-present current took hold of the boat, and they found that they were beginning to move down the river.
Jack worked hard at his task. He knew it would be to their advantage to get as far away from the bank as possible before pa.s.sing the places where the Serbs had lain in ambush. There would be less danger of their presence on the water being discovered in that case.
Josh hovered near by. Unable to resist the temptation, he finally took hold of the pole while Jack was pushing, and "leaned on it" in a way to render considerable a.s.sistance.
Everything seemed to be working in a satisfactory manner so far as making good progress went. If it kept up for a few minutes more Jack believed they would have achieved their end.
A single shot coming from further down the river on the northern bank gave him some little cause for uneasiness lest the fierce bombardment break out again. It proved to be a false alarm, since nothing followed, the Serbs never even taking the trouble to respond to the invitation.
They had taken up new positions, and apparently were averse to letting the enemy "feel them out."
Now they must have reached the place where the swaying bridge made of heavy planks laid upon successive pontoon boats had a short while before been in the process of completion.
It gave the boys a queer sensation to remember this. Over the spot which they were now pa.s.sing had swept that hurricane of missiles, mowing down the engineers engaged in bridge building as though they might be wheat falling before the reaper.
All was clear now, not a sign of the recent dreadful engagement being visible. Further down the river doubtless there would be met with fragments of the wrecked bridge. Jack knew that later on they would have to keep on the lookout for all such obstacles to a safe pa.s.sage; but there would be little or no danger up to the time they started the engine and increased their pace.
About that time, when all of them felt exceedingly nervous over the possibility of being fired upon, possibly Buster may not have been the only one of the little party who called himself a fool for having accepted this risk.
It was too late now for vain regrets, however; they had made their beds and must lie in them.
"Well, we"re past that awful place, anyway," whispered Buster presently; and no doubt, while the others did not echo his words, they felt just about as the stout chum did.
"Do you know," Josh was saying cautiously, "the way that bridge went to pieces made me think of a house of cards when you blow at it."
"Please don"t talk any more just now," asked Jack; "we"re still too close to the bank, and you might be heard."
"Correct!" said Josh, which in his vernacular was as much as asking Jack to excuse his break.
After they had floated along for some time, and Jack figured that they must by then have covered all of two miles, he decided it would be safe to start the engine. Of course, this could not be done without more or less popping and similar noise, try the best he was able; but Jack figured that the Serbs would not open fire for several good and sufficient reasons.
In the first place, they knew they had nothing to fear from one small launch, no matter if it were an enemy craft. Then again, as the Austrian Red Cross was undoubtedly searching for victims of that fusillade, there was a chance that this might be one of their units pursuing a mission of mercy.
Accordingly Jack started things up.
The engine responded readily to treatment, much to the satisfaction of Buster, who had been entertaining serious fears. The motor had proved tricky on one other occasion, he remembered, and on this account he wondered what they would ever do should it go back on them again.
They were now in the war zone, and it would hardly be possible to get repairs made and secure permission to continue down the Danube on their cruise.
Of course, Jack did not think to put on a full head of power; that would hardly have been wise while they were apt to come upon floating remnants of the bridge at any time.
"Josh, you can help me now if you want to," he presently told the other.
"Give your orders, then, Commodore."
"Crawl up forward, and keep as close a watch on the water as you can,"
Jack told him. "I mean directly in front of us, because it might get us in trouble if we ran smack into one of those pontoons out here in the middle of the river."
"I get your meaning, all right," responded Josh, starting to carry the plan out. "I"ll call myself the lookout man, and signal you to back her in case I see any sign of trouble ahead."
"Give a sharp whistle, and I"ll know what that means," the skipper told him.
So Josh crept past Jack and sprawled there in the extreme bow. He possessed good eyesight, and was likely to discover any floating object long before they were in danger of striking the same.
Buster, too, strained his eyes in order to try and supplement the good work; but George contented himself with lolling there in a comfortable position. What was the use, he doubtless figured, of everybody getting excited? If later on Josh wanted some one to "spell" him George would be quite willing to a.s.sume the responsibility; but he did not mean to wear out his eyes when not on duty. And no doubt George was quite right.
Things were going on so well that every one felt much encouraged. Buster was even trying to figure on what sort of speed they were making, and where they would arrive if able to keep on at this pace all through that night.
"Jack said it was about a hundred miles down to the Iron Gate," he told himself, "where the river makes a turn and starts to divide Serbia from Rumania. Wonder if we could make half of that between now and morning, and what would we do through the day? I must ask Jack first chance I get if he thinks it would be safe for us to keep on down the river by daylight, with soldiers guarding every mile of the banks and ordering us to come ash.o.r.e and explain who we are."
Just then Buster gave a sudden start, for Josh had whistled sharply.