Jim glanced swiftly across at the steamer. By now she was almost abreast of them, and if only he had but known it her commander was on the point of bringing his scheme to a termination by a rapid movement. He imagined that the slowing down of the launch was due again to further trouble of her motor. It was distinctly an opportunity to be snatched at, and, with a promptness which did him credit, he caused his steersman to swing his helm over. In an instant the steamer had changed her course and was heading for the broadside of the other vessel.
"Now," shouted Jim excitedly. "Right round with her. Let her rip. We've got 'em nicely."
It is one of the advantages of a gasolene motor, that the engine is capable of instant acceleration. A second before it had been purring gently, whilst the propeller was barely turning; but now the machinery gave out a sudden roar, while every plank and strut aboard shivered and vibrated. Under her keel the blades of her propeller churned the stream into milky foam, while the craft itself gathered way promptly. Once more she rolled heavily as Sam swung his wheel. Then she came round on her former course as if she were a living thing that understood, and was in full sympathy with the work expected of her. She bounded forward, raising her bows clear of the water, and by the time she had reached midstream had gained five lengths on the steamer.
"Edge her down, Sam; edge her down," urged Jim, giving hasty directions to his steersman. "Be ready to bring her over. That will be the time for you, Tomkins, and the others with the rifles."
It hardly needs the telling that the din from those aboard the steamer was now bewildering and deafening. But a few short seconds before the game had seemed entirely in their hands; it looked as though they would be aboard the other craft in a twinkling. Now they were hopelessly left behind; every instant made their failure more certain. Puffs of smoke burst from the crowded decks, while the huge bullets discharged from the gas barrels owned by the natives splashed all round Jim and his friends. Then there was a roar of anger as the launch turned once more on her heel, exposing her bottom boards right down to the keel as she rolled to the movement. A cloud of useless spears filled the air, while right aft of the steamer a figure sprang on to the stern deck waving both arms and shouting furiously. Tomkins's eye fell upon the man, and he gripped hard to the rail of the vessel to steady himself whilst she was rolling. Then down came his rifle, the weapon cracked forth a bullet, and the figure beyond collapsed across the engine and was hidden from view in the depth of the well which housed it. There were others amongst the natives who met with their deserts about the same moment; while, as if to put the question of the steamer's further utility entirely beyond discussion, there came suddenly from the neighbourhood of her funnel a thick column of hissing steam which rose in clouds over the river.
"I guess I'd had to shoot him," declared Tomkins grimly; "and well he deserved it. Say, sir, you needn't think no more of that steamer, for she's put clean out of the running. Reckon a bullet found her boiler and plugged a hole clean through it."
Whatever the cause of that cloud of escaping steam the effect was to bring the launch to a standstill. Indeed the position of affairs seemed to have become suddenly reversed. A little while before it had been Jim's motor which was hors de combat. He and his friends were stranded and helpless on the water. Now the situation was pleasantly reversed. As Tomkins had said, the steamer was out of the running.
"Dead straight ahead for them," called Jim, his eye fixed upon the huge war canoe hovering farther down the stream. "If they swerve, swing over towards them, and, when within a couple or more lengths, cut off in the other direction. Don't forget to keep them a spear throw from us."
"And meanwhile pepper 'em with the rifles, eh?" asked Tomkins, grinning over his shoulder, and wearing now a very different expression to the grim, determined look he had shown but a short while before. "Pepper 'em nicely, eh, so as to give 'em a taste of what's coming?"
But Jim shook his head decidedly. "There's been enough bloodlettin' already," he said, using the very words which the policeman had employed already. "We've done well with these other fellows, and have shot the two rascals for whom we came in this direction. These ignorant natives don't know any better. Guess we'll give 'em a chance."