He squirmed through the opening in the door and seeing no sign of any one outside called to Hugh to follow him. A moment later they stood side by side in the dark and narrow hallway. "We'd better get out of here as fast as we can," whispered Bob. "The sooner it is, the better I'm pleased," returned Hugh grimly. They stole along the hall, every sense alert. Presently they came to the head of the stairs and discovering nothing to alarm them, started down. The stairs still creaked and groaned, but the boys' confidence was rapidly returning as they neared outdoors and safety, and they hurried along. A side door stood open and toward this they made their way. Bob had returned his revolver to his pocket for he really thought he should not need it any more. He stepped out of the doorway and started down the steps. As he did so a man sprang at him and with a blackjack dealt him a stunning blow over the head. Bob reeled uncertainly for an instant, and then sank unconscious to the floor; there he lay in a limp heap. Before the man could deal with Bob's companion, Hugh had grappled with him, and a moment later they were rolling over and over on the ground fighting like wild cats. CHAPTER XIII MISTAKEN IDENTITY Hugh had seized the man by his right wrist and as they went down the blackjack was sent spinning. It was man to man, bare hands for weapons. Hugh's assailant was not large, but he was extremely agile. He squirmed and wriggled, kicked and butted, in fact he used every weapon at his command. Hugh probably outweighed his enemy, and in addition was a splendid wrestler, but he was young and his antagonist's strength was more developed. Each fighter struggled desperately to get an arm free. Once Hugh succeeded, but it was his left arm, and when he seized his opponent's throat his hold was soon shaken loose. They fought fiercely, both breathing hard, their faces were red and blotched, and their eyes were staring. Over and over they rolled, the stones and twigs on the ground tearing and lacerating their hands and faces. Hugh got hold of his opponent's right arm. He bent it back with every bit of strength he possessed, until the man cried out in pain. Hugh knew, however, that he would receive no mercy if he was overcome and he pressed home his advantage. Suddenly, with a convulsive twist of his body, the man shook loose Hugh's hold, and dealt him a heavy blow in the chest. Hugh felt his wind badly shaken and he seized his opponent around the waist with both arms, squeezing with all the strength in his body. His one idea was to keep as close to his enemy as he could, so that the man would have no opportunity to strike him again. Gradually Hugh felt his strength slipping. He knew he could not hold out much longer, and even as he struggled he wondered how soon it would be before the other Germans returned and made an end of him. Then when he least expected it, help came to him.