"Give him this money, and these notes, Reynaldo." (1.2, 1)
He closes with you in this consequence: “Good sir” or so, or “Friend,” or “Gentleman,” according to the phrase or the addition of man and country. (1.2, 51-54)
Polonius is speaking with his servant, Reynaldo. Polonius wants Reynaldo to go to Paris to spy on his son, Laertes.
"At “closes in the consequence.” Ay, marry." (1.2, 61)
Polonius is telling Reynaldo all of the things that Laertes is probably doing while away in college. He said that Laertes is probably swearing, drinking, gambling, and fighting with people.
Polonius is telling Reynaldo to pay careful attention to how people react when he gives hints about Laertes. He is telling him that if people start to act too friendly, they evidently know what Reynaldo is alluding to.
"God be wi' you. Fare you well." (1.2, 77)
Polonius keeps mentioning the same things so he is starting to lose his train of thought. He keeps reiterating the fact that Reynaldo needs to pay attention to detail so that he will be able to recall if people know Laertes or not. He also has to find out if they know him for the right reasons.
Laertes at college, talking to another student. The students at the school are going to be the targets of Reynaldo's investigations.
Polonius is wishing Reynaldo a safe trip and good luck on his trip to solve the case about Laertes.