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. 
But as long as Dal could remember, he had wanted to be a doctor. From 
the first time he had seen a General Practice Patrol ship landing in his 
home city to fight the plague that was killing his people by the 
thousands, he had known that this was what he wanted more than 
anything else: to be a physician of Hospital Earth, to join the ranks of 
the doctors who were serving the galaxy. 
Many on Earth had tried to stop him from the first. He was a Garvian, 
alien to Earth's climate and Earth's people. The physical differences 
between Earthmen and Garvians were small, but just enough to set him 
apart and make him easily identifiable as an alien. He had one too few 
digits on his hands; his body was small and spindly, weighing a bare 
ninety pounds, and the coating of fine gray fur that covered all but his 
face and palms annoyingly grew longer and thicker as soon as he came 
to the comparatively cold climate of Hospital Earth to live. The bone 
structure of his face gave his cheeks and nose a flattened appearance, 
and his pale gray eyes seemed abnormally large and wistful. And even 
though it had long been known that Earthmen and Garvians were equal 
in range of intelligence, his classmates still assumed just from his 
appearance that he was either unusually clever or unusually stupid. 
The gulf that lay between him and the men of Earth went beyond mere 
physical differences, however. Earthmen had differences of skin color, 
facial contour and physical size among them, yet made no sign of 
distinction. Dal's alienness went deeper. His classmates had been civil 
enough, yet with one or two exceptions, they had avoided him carefully. 
Clearly they resented his presence in their lecture rooms and
laboratories. Clearly they felt that he did not belong there, studying 
medicine. 
From the first they had let him know unmistakably that he was 
unwelcome, an intruder in their midst, the first member of an alien race 
ever to try to earn the insignia of a physician of Hospital Earth. 
And now, Dal knew he had failed after all. He had been allowed to try 
only because a powerful physician in the Black Service of Pathology 
had befriended him. If it had not been for the friendship and support of 
another Earthman in the class, Tiger Martin, the eight years of study 
would have been unbearably lonely. 
But now, he thought, it    
    
		
	
	
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