I am looking for citations about what Polonius, Gertrude, Claudius (hopes), Guildenstern and Rosencrantz believes Prince Hamlet's madness is due to?
How about these?
Polonius: I will go seek the King.
This is the very ecstasy of love. (Act 2, Scene 1)
Polonius thinks Hamlet's madness is due to Ophelia's rejection of Hamlet.
Gertrude: I doubt it is no other but the main,
His father's death and our o'erhasty marriage. (Act 2, Scene 2)
Claudius (more suspicious but not sure as to the reason):
"Madness in great ones must not unwatched go." (Act 3, Scene 1)
Rozencrantz and Guildenstern most likely believe Hamlet is suffering because Claudius has thwarted Hamlet's ambitions for the throne.
Rozencrantz (to Hamlet's confession that Denmark is like a prison). "Why, then your ambition makes it one. 'Tis too narrow for your mind." (Act 2, Scene 2).
Which character(s) do you think is right?