 Which is not true about why Crownwall was able to travel to Vega undetected?
The sight of an Earthman on Vega III, where it was impossible for an outlander to be, brought angry crowds to surround John Crownwall as he strode toward the palace of Viceroy Tronn Ffallk, ruler of Sector XII of the Universal Holy Empire of Sunda. What I meant was that I expected someone from Earth to break through our blockade and come here. "If you wanted someone from Earth to come here to see you, why did you put the cordon around Earth? And why did you drop a planet-buster in the Pacific Ocean, and tell us that it was triggered to go off if we tried to use the distorter drive? There was even serious discussion of destroying Earth out of hand, while it is still possible.
 He traveled into the future so as to not need to experience the distance travel himself
 He was not technically moving through space in a typical sense  He employed technology unfamiliar to the Vegans  His ship's drive does not give off the usual traceable signals  He traveled into the future so as to not need to experience the distance travel himself