The Ghost flees dawn: for the King there's no noontime. Hamlet kills himself in his cell when he hears of the Queen's death. He wakes up to the King's words and an irritated anger he cannot explain or disguise
Hamlet ignores Horatio's supernatural ramblings and something breaks between them. He tries too to ignore the voices that pursue him through the halls of mind and castle. Something breaks or reveals itself broken and he jumps from the walls where he hallucinates the same ghost his once-friend did. "Somebody is watching," he thinks.
He follows Horatio. Refuses the Ghost. Kisses Horatio. Something breaks between them. Hamlet takes to drinking and worse. One night he wakes up enough to think he hears the King enter his chamber and whisper a liquid murmur in his ear.
As befits a brave Prince and a careful scholar Hamlet listens quietly to the Ghost. He listens quietly to Horatio, says little to his mother and less to the King. Quiet becomes silence becomes stillness when all action including speech becomes thought and no thought becomes action. The King has him locked in a tower to pretend they have to. When he stops eating they don't try too hard to force him to.
Hamlet vows, plans, wavers, kills, doubts, consents, and is not surprised when he dies among corpses, feeling that whoever is watching approves. The rest is silence.
He grabs Horatio from the quiet speech of surprised soldiers who he recognizes dimly but with firm dread. Hamlet hastens friend and horses and they leave, Horatio as puzzled as everybody in the castle will be. The perhaps-prince explains nothing and looks around as they ride for something he knows he can't see. The path to Wittenberg is long and ends on Elsinore.