The Ship From Outside — A. Bertram Chandler

The reward for rescuing Thermopylae is finally paid, and Calver and his shipmates from Lorn Lady purchase a ship and rename her The Outsider. Two years are spent as a charter to Rim Runners, then six months tramping, before Sonya Verrill reappears and engineers a charter from the Federation Survey Service to look for an alien derelict. She accompanies The Outsider, but proves very disruptive to Jane Calver.