I was greatly flattered by the personnel of the first matriculants. Not only were there scientists and soldiers from the first five classes of Havatoo, but every member of the Sanjong, the ruling quintumvirate of Havatoo, enrolled. The thirst of these people for useful knowledge is insatiable. Shortly after noon, my work for the day having been completed, I received a summons to call upon Korgan Kantum Mohar, the warrior physicist who had arranged for the examination of Nalte and myself the day Ero Shan brought us to the city. I could not but wonder what he wanted of me. Could it be that I must undergo another examination? Always, I presume, I shall connect Mohar's name with examinations. As I entered his office on the Sera Tartum he greeted me with the same pleasant demeanor that had marked his attitude the day he had told me I was to be examined to ascertain whether or not I should be permitted to live; so his graciousness was not entirely reassuring. "Come over here and sit down near me," he said. "I have something here that I should like to discuss with you." As I took a chair beside him I saw spread on his desk the sketches of airships that I had made for Ero Shan. "These," he said, pointing to the sketches, "were brought to me by Ero Shan who explained them as best he could. He was quite excited and enthusiastic about them, and I must confess that he imparted some of his enthusiasm to me. I am much interested, and would know more concerning these ships that sail through the air." For an hour I talked to him and answered his questions. I dwelt principally on the practical achievements of aëronautics--the long flights, the great speed, the uses to which ships had been put in times of peace and in times of war. Korgan Kantum Mohar was deeply interested. The questions that he asked revealed the trained, scientific mind; and the last one that of the soldier, the man of action. "Can you build one of these ships for me?" he demanded. I told him that I could but that it might require long experimentation to adapt their motors and materials to the requirements of a successful airplane. "You have two or three hundred years," he said with a smile, "and the resources of a race of scientists. Materials that we do not now possess we can produce; nothing is impossible to science." XVI ATTACK IN THE NIGHT I was given a factory close to the Gate of the Physicists, at the end of Kantum Lat. I chose this location because there was a level plain beyond this gate that would make an excellent flying field, and also so that I would have my finished plane finally assembled where it could easily be wheeled out of the city without interfering with traffic to any great extent. On the advice of the Sanjong, which took a deep interest in both this new venture into aëronautics and the, to them, new science of astronomy, I divided my time between the two.