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 compass," as the thing was called.
"For example," continued Carthoris, "I have an all-night trip before me, as tonight. I set the pointer here upon the right-hand dial which represents the eastern hemisphere of Barsoom, so
