There came a muffled cry, a flash of olive-drab down the aisle, the reverberating slam of a door; then silence. At intervals throughout the car, drowsy heads bobbed up, the glances of their owners sleepily directed toward the rear door. Several of their comrades nearer to the door than themselves were up, and making for it. Undoubtedly, something unusual had happened. But what? They could not then know that already some distance behind them, two soldiers, mud-plastered, and shaken by their mad leap in the dark, were, nevertheless, engaged in the fight of their lives. A battle in which Honor strove against Dishonor; a conflict between Loyalty and Disloyalty. CHAPTER XXI THE FIGHT Shut in on all sides by the fog, ankle deep in the mud, Corporal Jimmy Blaise and Private Bixton were locked in a savage grip, from which one of them fought desperately to free himself. Bixton had no will to fight--he wanted to run. Once clear of his hated antagonist, he could dash off into the blackness, and defy pursuit. Only one man stood between him and liberty. He had risked too much already to endure defeat and capture. He _must_ break away. Jimmy was as fully determined in an opposite direction. Reckless disregard for himself had caused him to act with his usual impetuosity. He had reached the door just in time to see Bixton about to swing off the train. In the next instant he had followed his quarry. Luckily for him, the force of Bixton's descent had sent him sprawling in the mud, for an instant stunned. Had the train been going at full speed, he must undoubtedly have been killed. Jimmy, on the contrary, had landed on his feet like a cat. Turning instantly, he ran back to where Bixton was just picking himself up. With a hoarse shout of triumph, Jimmy leaped upon Bixton and slammed him back to earth. Simultaneously with the onslaught, Bixton's brain began to act. His long, wiry arms flung about Jimmy, he put his full strength into use. Over and over in the mud they rolled, neither able to gain the advantage. It was a sickening struggle, calculated to wear out both combatants in short order. The collapse of one meant the supremacy of the other. Evenly matched in sheer brute strength, it soon became a test of which could endure longest.