Read the excerpt from Hamlet, Act I, Scene i. Horatio: That can I; At least, the whisper goes so. Our last king, Whose image even but now appear’d to us, Was, as you know, by Fortinbras of Norway, Thereto prick’d on by a most emulate pride, Dar’d to the combat; in which our valiant Hamlet— For so this side of our known world esteem’d him— Did slay this Fortinbras; who, by a seal’d compact, Well ratified by law and heraldry, Did forfeit with his life all those his lands Which he stood seiz’d of, to the conqueror; What is the main purpose of Horatio’s speech?