At that instant a backward eddy of the battle surged over the pair. The maniacal Red Bones, fighting to the last bitter drop of doom, found two white men under their feet. Screeching, snarling, they fell on them like wild beasts, tearing with tooth and nail. Their arrows were gone, their darts exhausted, and no spearman was among them; they fought with nature's weapons, while above them one lone clubman struggled to swing down his lethal bludgeon without killing his fellows. McKay, wrenching his machete loose and gripping it with both hands, got its point upward and jabbed blindly at the weight of flesh bearing him down. Faintly to his ears came yells of rage and the impact of blows--the battle roars of Tim and Knowlton, who with their machetes were cleaving a way to their captain. But the beastly demons over him still crushed him down on Schwandorf, smothering him under the burden of bodies dead and alive. His stabs grew weak. Exhaustion and lack of air were killing him more surely than the savages. Pedro, Lourenço, José and the inexplicable Rand came slashing and clubbing a path of their own to the beleaguered Scot--the Brazilians cutting straight ahead with deadly surety, the painted Peruvian chopping and thrusting with a fixed grin, Rand swinging the gun butt down on head after head. From still another direction Yuara and his satellite came boring in with spears snatched from dead hands. The three rescue parties reached the squirming heap at almost the same moment. But Yuara was the one whose arrival counted most. In one last convulsive struggle McKay heaved himself up until he was once more on his knees. His head came out of the welter, his mouth wide and gulping for breath. The lone clubman grunted, swung his weapon high, and with all the power of his muscular body drove it down at that upturned, unprotected face. With a mighty plunge Yuara threw himself over the captain. His spear sank into the stomach of the clubman. But the heavy wooden war hammer fell with crushing force. As the Red Bone collapsed with the spear head buried in his middle, his slayer also dropped under that terrible stroke with head mangled beyond recognition. Yuara, son of Rana, warrior of Suba, who owed his life to McKay's rough surgery, had paid his debt. Under the impact of his body McKay also slumped forward, senseless.