"No heavier, in proportion, than a kite, sir," Potts explained. The crude mountaineer captain, standing slightly behind the general, snickered. "Hit won't work nohow," he predicted. "Jist like that there Williams repeatin' cannon at Seven Pines. Ain't even got no steam engine fur as I kin see." Potts said, "This is a new type engine. It operates on a formula of my own, which I have named gasoline. Now, if you gentlemen will excuse me, I shall proceed with the demonstration." Potts climbed into the cockpit. A touch of the starter set the 1,000 h.p. radial engine roaring. He waved to the gaping officers and opened the throttle. The bi-plane whisked down the field and rocketed into the blue morning sky. Too late, Potts saw the buzzard soaring dead ahead. He shoved the stick forward, but the black bird rushed toward his face in frightening magnification. * * * * * Potts opened his eyes. He had walked into a wall. "What's the matter, Orville Potts?" Joe asked. "You sleep-walking? Get in there! I'll wake you up." Joe shoved Potts through the door marked PHYSICAL THERAPY and into the dressing room. With sixteen patients in the process of disrobing, the small room presented a scene of wild, indecent activity. Potts squirmed through the thrashing tangle to a bench against the wall. He sat down and removed a shoe. Potts almost felt the currents surging through the neurons of his brain and sensed a throbbing on the inside of his skull. Twice this morning, he had tried to break through the physical barrier and had failed. Even with a minimum of thought, the reasons for failure became obvious. Lack of intimate detail seemed the principle cause. In his attempt to reach the Crimean War and lead the Charge of the Light Brigade, he had been hampered by his ignorance of correct uniforms and commands. He did not know at what time of day the charge had taken place, the weather conditions, the appearance of the terrain, or even the exact date. He believed it was about 1855, but he wouldn't risk a dime bet on his guess. Perhaps an attempt to return to the past was certain to fail. Surely the past had happened, was settled, inviolate. Someone named Lord Cardigan, not Orville, Lord Potts, had led the charge. Inventing an airplane during the Civil War also had no chance of success. No such thing actually happened, and, if it had, the plane would have been more crude than the Wright brothers' machine. Furthermore, Potts was no aviator. Success, if any, lay in the future. The future was yet to come, and Potts could mold events to his liking. Or perhaps he could move his body in space, instead of time. He could think himself out of the hospital. "Orville Potts, get those clothes off!" Wilhart ordered. Potts slowly removed his faded garments. He took his place at the end of the line of naked men leading to the needle shower.