The traveling crane picked up these numbered parts of the keel and in succession delivered them to the gang handling the emplacement on the trusses. The prow was railroaded to the far end of the building and eased into place. The second section was brought forward. The gang was busy with this while the crane, traveling upon an overhead rail, was supposed to drift down the length of the shop again, drawn by the power of the stationary engine. The crane and its swinging hooks and loops of chain traveled almost silently. No workman around the keel noted that the crane stopped half way to the door of the shop. It seemed to have fouled, for it stopped abruptly and the overhead rail shivered through its entire length. Tom had mounted to one of the trusses and with voice and gesture was advising his helpers how he wished the last piece of the keel placed. The clanging of other machinery, the echo of hammers, the roar of escaping steam, well nigh deafened them all. Of a sudden Koku, the giant, emitted a shriek that might have been envied by a steam locomotive! He leaped directly at Tom. He hurdled two of the trusses as though they were no higher than croquet hoops, and with broad-spread arms and clutching hands, lunged at the young inventor. “Look out there, Mr. Tom!” cried one of the men, making his voice heard even above Koku’s roar. “That giant’s gone crazy!” Before the young fellow could turn to see what was threatening him, Koku was upon him and had seized him in his mighty arms. CHAPTER X BAD LUCK The great leap of the excited giant carried him under and beyond the overhead rail from which the traveling crane hung. The wind of the rebounding crane seemed to sweep Koku and Tom aside. They escaped the swinging hooks and chains by a very close margin. But all of the unobservant workmen were not so fortunate. Two of them were knocked senseless by the chain, one with a broken shoulder blade, the other with a cut on his head that bled profusely. Several others were knocked down. Tom was up with a yell, wrenched himself from Koku’s grasp, and started down the shop with the speed of a deer. “Who did that? Stop your engine! Throw off the power!” he yelled. But already the man in charge of the power governing the crane had come to his senses. He had thrown over the lever and shut off the power. The swinging loops of heavy steel links were now at the far end of the shop. The accident was, for a time, seemingly inexplicable. The crane traveling toward the shop door had been seemingly stuck. The controller had been thrown twice to start it. And when the fouled crane had started, it had rushed backward instead of forward. Only Koku’s sharp gaze had observed it, and his quick action had saved Tom Swift from disaster. An ambulance was sent for to take the two more seriously injured men to the hospital. Meanwhile the general opinion in the erecting shop was that a deliberate attempt had been made against the young inventor’s life.