 Why is Crownwall the representative from Earth sent to Vega?
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. If they carried out the threats of their present attitude, Earth would have to send Marshall to replace him. "Just tell him that a man has arrived from Earth to talk to him. Behind him stood a heavy and pompous appearing Vegan in lordly trappings. "If you wanted someone from Earth to come here to see you, why did you put the cordon around Earth?
 He was a reasonable option given his prior leadership experience on missions
 He was the only one who was willing to undergo the time travel procedure  He was the only one without connections on Earth, making it easier for him to take time away  He was the default choice once the humans determined that Marshall was not fit for the job  He was a reasonable option given his prior leadership experience on missions