He tried to sleep, but couldn't. The shuttle trip from the Port of Philadelphia to Hospital Seattle was almost two hours long because of passenger stops at Hospital Cleveland, Eisenhower City, New Chicago, and Hospital Billings. In spite of the help of the pneumatic seats and a sleep-cap, Dal could not even doze. It was one of the perfect clear nights that often occurred in midsummer now that weather control could modify Earth's air currents so well; the stars glittered against the black velvet backdrop above, and the North American continent was free of clouds. Dal stared down at the patchwork of lights that flickered up at him from the ground below. Passing below him were some of the great cities, the hospitals, the research and training centers, the residential zones and supply centers of Hospital Earth, medical center to the powerful Galactic Confederation, physician in charge of the health of a thousand intelligent races on a thousand planets of a thousand distant star systems. Here, he knew, was the ivory tower of galactic medicine, the hub from which the medical care of the confederation arose. From the huge hospitals, research centers, and medical schools here, the physicians of Hospital Earth went out to all corners of the galaxy. In the permanent outpost clinics, in the gigantic hospital ships that served great sectors of the galaxy, and in the General Practice Patrol ships that roved from star system to star system, they answered the calls for medical assistance from a multitude of planets and races, wherever and whenever they were needed. Dal Timgar had been on Hospital Earth for eight years, and still he was a stranger here. To him this was an alien planet, different in a thousand ways from the world where he was born and grew to manhood. For a moment now he thought of his native home, the second planet of a hot yellow star which Earthmen called "Garv" because they couldn't pronounce its full name in the Garvian tongue. Unthinkably distant, yet only days away with the power of the star-drive motors that its people had developed thousands of years before, Garv II was a warm planet, teeming with activity, the trading center of the galaxy and the governmental headquarters of the powerful Galactic Confederation of Worlds. Dal could remember the days before he had come to Hospital Earth, and the many times he had longed desperately to be home again. He drew his fuzzy pink friend out of his pocket and rested him on his shoulder, felt the tiny silent creature rub happily against his neck. It had been his own decision to come here, Dal knew; there was no one else to blame. His people were not physicians. Their instincts and interests lay in trading and politics, not in the life sciences, and plague after plague had swept across his home planet in the centuries before Hospital Earth had been admitted as a probationary member of the Galactic Confederation.