 Why was the Space Patrolman surprised that Tolliver referred to Betty as "Miss Koslow"?
Tolliver began to have his doubts the next day; which was "Tuesday" by the arbitrary calender constructed to match Ganymede's week-long journey around Jupiter. On the bulletin board, Tolliver's name stood out beside the number of one of the airtight tractors used between the dome city and the spaceport, or for hauling cross-country to one of the mining domes. He soon found that there was nothing for him to do but hang around the garage in case a spaceship should land. Sometimes there's no reason but them for sending a ship back with a crew instead of in an economy orbit. They found they could send back loaded ships by 'automatic' flight—that is, a long, slow, economical orbit and automatic signalling equipment.
 It was a cover name, not her real name.
 It was a cover name, not her real name.  He realized that she was the boss' daughter.  The Space Patrolman didn’t know her name.  She wasn’t supposed to tell anyone who she was.