Polonius sends his servant Reynaldo to Paris to question Laertes' friends and acquaintances in order to discover how his son is living. He wants to be sure that Laertes hasn't returned to the wild, youthful behavior that marked his past. Ophelia enters to tell her father of a visit from Hamlet. She is concerned because he was disheveled, pale, and acting quite mad. Polonius fears that Hamlet is mad for her love and upon learning that his daughter has obeyed in avoiding the Prince, becomes convinced. Polonius takes Ophelia and rushes off to tell the King.
Hamlet: Novel Summary: Act 2, Scene 1