A week passed, a week during which I permanently discarded my reddish whiskers and received an injection of the longevity serum. The latter event suggested that possibly Mintep would eventually liberate me, for why bestow immortality upon a potential enemy who is one’s prisoner; but then I knew that the serum did not confer absolute immortality—Mintep could have me destroyed if he wished, by which thought was suggested the possibility that the serum had been administered for the purpose of lulling me into a sense of security which I did not, in reality, enjoy. I was becoming suspicious. While Danus was injecting the serum, I asked him if there were many doctors in Vepaja. “Not so many in proportion to the population as there were a thousand years ago,” he replied. “All the people are now trained in the care of their bodies and taught the essentials of health and longevity. Even without the serums we use to maintain resistance to disease constantly in the human body, our people would live to great ages. Sanitation, diet, and exercise can accomplish wonders by themselves. “But we must have some doctors. Their numbers are limited now to about one to each five thousand citizens, and in addition to administering the serum, the doctors attend those who are injured by the accidents of daily life, in the hunt, and in duels and war. “Formerly there were many more doctors than could eke out an honest living, but now there are various agencies that restrict their numbers. Not only is there a law restricting these, but the ten years of study required, the long apprenticeship thereafter, and the difficult examinations that must be passed have all tended to reduce the numbers who seek to follow this profession; but another factor probably achieved more than all else to rapidly reduce the great number of doctors that threatened the continuance of human life on Amtor in the past. “This was a regulation that compelled every physician and surgeon to file a complete history of each of his cases with the chief medical officer of his district. From diagnosis to complete recovery or death, each detail of the handling of each case had to be recorded and placed on record for the public to consult. When a citizen requires the services of a physician or surgeon now, he may easily determine those who have been successful and those who have not. Fortunately, today there are few of the latter. The law has proved a good one.” This was interesting, for I had had experience with physicians and surgeons on earth. “How many doctors survived the operation of this new law?” I asked. “About two per cent,” he replied. “There must have been a larger proportion of good doctors on Amtor than on earth,” I commented.