there was the true ring of sincerity in it. “I told you that I loved you, Thuvia, before I knew that you were promised to another. I may not tell you it again, but I am glad that you know it, for there is no dishonour in it either to you or to Kulan Tith or to myself. My love is such that it may embrace as well Kulan Tith—if you love him.” There was almost a question in the statement. 

 “I am promised to him,” she replied. 

 Carthoris backed slowly away. He laid one hand upon his heart, the other upon the pommel of his long-sword. 

 “These are yours—always,” he said. A moment later he had entered the palace, and was gone from the girl’s sight. 

 Had he returned at once he would have found her prone upon the ersite bench, her face buried in her arms. Was she weeping? There was none to see. 

 Carthoris of Helium had come all unannounced to the court of his father’s friend that day. He had come alone in a small flier, sure of the same welcome that always awaited him at Ptarth. As there had been no formality in his coming there was no need of formality in his going. 

 To Thuvan Dihn he explained that he had been but testing an invention of his own with which his flier was equipped—a clever improvement of the ordinary Martian air compass, which, when set for a certain destination, will remain constantly fixed thereon, making it only necessary to keep a vessel’s prow always in the direction of the compass needle to reach any given point upon Barsoom by the shortest route. 

 Carthoris’ improvement upon this consisted of an auxiliary device which steered the craft mechanically in the direction of the compass, and upon arrival directly over the point for which the compass was set, brought the craft to a standstill and lowered it, also automatically, to the ground. 

 “You readily discern the advantages of this invention,” he was saying to Thuvan Dihn, who had accompanied him to the landing stage upon the palace roof to inspect the compass and bid his young friend farewell. 

 A dozen officers of the court with several body servants were grouped behind the jeddak and his guest, eager listeners to the conversation—so eager on the part of one of the servants that he was twice rebuked by a noble for his forwardness in pushing himself ahead of his betters to view the intricate mechanism of the wonderful “controlling destination 

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