It was impossible now to recover his pistol, but he would make it difficult for Nicholas to get the knife. The struggle in that way was equalized. He turned in the gripping arms about him and the men were chest to chest. Neither spoke; each fought solely to get the other prostrate, while Nicholas developed a secondary pressure toward the blade buried in the wall. This Woolfolk successfully blocked. In the supreme effort to bring the struggle to a decisive end neither dealt the other minor injuries. There were no blows--nothing but the straining pull of arms, the sudden weight of bodies, the cunning twisting of legs. They fought swiftly, whirling and staggering from place to place. The hot breath of an invisible gaping mouth beat upon Woolfolk's cheek. He was an exceptionally powerful man. His spare body had been hardened by its years of exposure to the elements, in the constant labor he had expended on the ketch, the long contests with adverse winds and seas, and he had little doubt of his issuing successful from the present crisis. Iscah Nicholas, though his strength was beyond question, was heavy and slow. Yet he was struggling with surprising agility. He was animated by a convulsive energy, a volcanic outburst characteristic of the obsession of monomania. The strife continued for an astonishing, an absurd, length of time. Woolfolk became infuriated at his inability to bring it to an end, and he expended an even greater effort. Nicholas' arms were about his chest; he was endeavoring by sheer pressure to crush Woolfolk's opposition, when the latter injected a mounting wrath into the conflict. They spun in the open like a grotesque human top, and fell. Woolfolk was momentarily underneath, but he twisted lithely uppermost. He felt a heavy, blunt hand leave his arm and feel, in the dark, for his face. Its purpose was to spoil, and he caught it and savagely bent it down and back; but a cruel forcing of his leg defeated his purpose. This, he realized, could not go on indefinitely; one or the other would soon weaken. An insidious doubt of his ultimate victory lodged like a burr in his brain. Nicholas' strength was inhuman; it increased rather than waned. He was growing vindictive in a petty way--he tore at Woolfolk's throat, dug the flesh from his lower arm. Thereafter warm and gummy blood made John Woolfolk's grip insecure. The doubt of his success grew; he fought more desperately. His thoughts, which till now had been clear, logically aloof, were blurred in blind spurts of passion. His mentality gradually deserted him; he reverted to lower and lower types of the human animal; during the accumulating seconds of the strife he swung back through countless centuries to the primitive, snarling brute. His shirt was torn from a shoulder, and he felt the sweating, bare skin of his opponent pressed against him.