But although the air was motionless and heavy, the sea was far from being calm. It heaved with a swell that tossed the Nomad almost on her beam-ends at times. That some peculiar kind of tropical storm, or typhoon, was approaching, Nat felt small doubt. A glance at the barometer showed that that instrument had fallen with incredible rapidity. A candle, held in the thick, murky air, would have flamed straight skyward without a flicker.
Dinner was eaten without a change being observable in the weather conditions, and, on coming on deck to relieve Joe at the wheel while he went below to eat, Nat sighted the bit of land toward which they were now being drawn like a needle to a lodestone. In the meantime the weather had been growing more and more extraordinary. The copperish sky had deepened in color till a panoply of angry purple overspread the heaving sea. The sun glared weakly through the cloud curtains as through a fog. But still there had come no wind.
Hardly had the two lads on the bridge of the Nomad realized that they were inexorably being drawn toward the two islands, however, when from far off to the southwest there came a low, moaning sound. It seemed almost animal in character; like the lowing of an angry bull, in fact, was the comparison that occurred to Nat. The sound increased in violence momentarily, while the sky from purple changed to black, and a blast like that from an open oven door fanned their faces. Through this awe-inspiring twilight the Nomad continued her inexplicable advance toward the two islands.
“Here it comes!” shouted Joe suddenly, as, from the same quarter as that from which the wind had proceeded, there came a sudden, angry roar.
“Hold tight for your life!” flung back Nat over his shoulder, gripping his steering wheel with every ounce of strength he possessed.
And thus began hours of stress and turmoil, which the Motor Rangers were ever to remember as one of the most soul-racking experiences of their young lives.
CHAPTER II.
NAT TO THE RESCUE
“Wow! This is the worst ever!”
Joe was clinging tightly to the bridge of the Nomad.
Spray, flying like dust through the dense mid-afternoon twilight, stung his face. The wind whipped out his garments stiff, as if they had been made of metal, and half choked the words back down his throat.
Nat made no reply. He clung grimly to his wheel, striving with might and main to head the Nomad into the furious waves. Ding-dong Bell had emerged on deck an instant before, but had been promptly ordered below again.
“Keep your engines doused with oil; give them plenty of gasolene, and stand by for signals,” had been the young captain’s orders.
Below, beside his shining, laboring engines, Ding-dong was valorously striving to carry those orders out. But the strain on the motors was as great as they had ever been called upon to bear, even in the memorable encounter with the waterspouts.
Besides heading into the storm, Nat was “bucking” the strange current that set toward the island chasm. But powerfully as the Nomad’s propeller churned the driving seas, the unseen tide was more powerful still.
“Nat, we’re bound to be drawn into that gorge within a few minutes, unless – ”
“Unless a miracle happens.”
Joe’s comment and Nat’s rejoinder were both shouted above the storm. Their voices sounded feeble as whispers amid the fury of the conflicting elements.
Hardly a hundred yards now separated the storm-battered Nomad from the towering walls and boiling waters of the chasm. Inevitably, unless the miracle of which Nat had spoken occurred, they must, in a few moments, be laboring in the midst of that ominous-looking place. While the thought was still pulsating through their minds, and their hearts beat high with apprehension, the dreaded thing happened.
The Nomad was suddenly caught, as if by hands bent on causing her dissolution, and hurtled straight into the cleft between the islands. Nat, hardly conscious of what he was about, directed her course so that the craft was not instantaneously dashed to bits against the side of the cliffs. Joe, too alarmed to utter a word, simply clung tight to the rail. Below, in the engine-room, Ding-dong Bell was thrown from his feet and smashed up against a steel stanchion.
The blow knocked him senseless. And so, with her engineer unconscious, another member of her crew almost useless from fright, and only one guiding spirit on board her, the Nomad hastened forward into what seemed certain annihilation.
Within the cleft it was black as night. The angry seas that boiled and gnashed between the steep walls, for an instant completely hid the Nomad from view. But presently she gallantly emerged, fighting like a live thing for her life.
The wind, compressed within those narrow confines, blew with a force and fury almost incredible except to those who have passed through a South Pacific storm. It would have been impossible to cry out and make one’s voice heard. The most powerful shout would not have been audible a foot away. The situation of the Motor Rangers appeared to be almost desperate.
“Can she last out? Can she possibly stand this terrific battering?”
Such were the thoughts that galloped through Nat’s excited brain. He rang the electric signal for “more power,” but no response came from the engine-room, where Ding-dong lay senseless beside his motors.
Then he turned about to look for Joe. Now that his eyes had grown used to the darkness it was possible to see – as one sees on a night when the moon is obscured by heavy clouds. The young captain’s heart leaped into his mouth as his eyes pierced the obscurity.
Except for himself, the bridge was empty of life.
Joe Hartley had vanished!
“Swept overboard!” shot through Nat’s brain.
At the same instant he caught a cry:
“Help! Help!”
It appeared to come from far astern.
“Joe!” shouted Nat into the darkness.
“Help!” came the cry again. It was closer this time.
A coil of light but strong rope was looped to the bridge in front of Nat. Without an instant’s hesitation, he tied one end of it about his waist. He had reached a desperate determination. If he got a chance, he had made up his mind to save Joe Hartley if it were humanly possible. The other end of the coil he knew was made fast to the bridge rail, so that a final testing of the knot about his waist was all that was necessary to put his daring scheme into execution. But first Nat fixed the wheel by means of the metal grips provided for that purpose.
Then, with every nerve a-quiver, every muscle flexed, he waited for another summons. Suddenly it came.
“Help, Nat! I – ”
A smother of foam swept glimmering past the Nomad. It was luminous with phosphorescence. Amidst the greenish, ghastly glare, was plainly perceptible a darker spot. It was a human head.
“Hold on, Joe! I’ll be with you!” shouted Nat, and then, without hesitation, he mounted the bridge rail at the port side and plunged into the mass of spume.
Fortunately for those interested in the adventures of the Motor Rangers, at that instant a freak of the current spun Joe’s body about and flung him, like a bit of driftwood, toward the side of the Nomad. In a flash Nat’s strong arm was about him. It was just in time, too, for Joe, who had been swept from the bridge unseen when the Nomad encountered the angry maze of cross currents and tide rips, was almost exhausted.
In this condition he was not in full possession of his ordinary presence of mind. He clung to Nat desperately, with a grip that threatened to pull both rescuer and rescued under water together.
Nat, battling with the sharp, angry waves, as choppy and angular as giant fangs, had all he could do without struggling with Joe. Again and again he tried to break the other’s grip, but without avail. The hold of a drowning man or boy is the most tenacious known. It is almost impossible to loosen it.
“Joe, you must let go of me!” gasped out Nat.
But