Possible Clues:

• Old transport on river outside the city walls
• A million pocketed by ruler — tax is high, without boundaries
• More painting required in college department
• Taking place off campus?
• Off-premises (univ. studies)
• Vehicle once seen by Russian river, outside city walls
• More painting outside the university
• Former transport to old city and a lake outside the walls
• Left over big picture being off course
• The kind of learning that is beyond the pale