Cameron improved his facility with the language, and Joyce was beginning to get along without the translator. They were introduced to a considerable number of other Markovians, including the official representative of Premier Jargla. This gave them added contact with the Markovian character, but Marthasa and his family seemed so typical of the race that scarcely anything new was learned from the others. At no time was anything hinted in reference to the original reluctance to have the Terrans visit the Nucleus. All possible courtesy was shown them now, and Cameron dared not mention the invitations to stay home. He felt the situation was as penetrable as a thick wall of sponge rubber backed by a ten-foot foundation of steel. After three weeks of this, however, he cautiously broached the subject of meeting the son and daughter of Marthasa in regard to visiting the library and museum. He had met each of them just once and found them rather cool to his presence. He had not dared express his interest in their specialties at that time. Marthasa was favorable and apologetic, however. "I have intended to arrange it," he said. "There have been so many other things to do that I have neglected your interest in these things. We won't neglect it any longer. Suppose we make an appointment for this afternoon? Zlenon will be able to give you his personal attention." [Illustration: JOYCE] Zlenon was Marthasa's son, who held the position of Chief Historian at the research library. He was more slender and darker than his father, and lacking in his volubility and glad-handedness. He greeted Cameron's request with a tolerant smile. "You have to be quite specific, Mr. Wilder, when you say you would like to know about the history of the Markovian Nucleus. You understand the Nucleus consists of over a hundred worlds and has a composite history extending back more than thirty thousand of your years in very minute detail." Cameron countered with a helpless shrug and smile. "I'm afraid I'll have to depend on your good nature to guide me through such a mass. I don't intend to become a student of Markovian history, of course, but perhaps you have adequate summaries with which a stranger could start. Going backward, let us say, for perhaps two or three hundred Terran years?" "Of course--some very excellent ones are available--" He moved toward the reading table nearby and began punching a selection of buttons. As Cameron and Joyce moved to follow, Marthasa waved a hand expansively and started out the other way. "I can see you're going to be set for a while. I'll just leave you here, and send the car back after I reach the house. Don't be late for dinner." They nodded and smiled and turned to Zlenon. The Markovian was watching them with pin-point eyes. "I wondered if there was any _particular_ problem in which you might be interested," he said calmly. "If there is--?" Cameron shook his head hastily. "No--certainly not. Just general information--"