1. In these pages Marcellus asks what in the world is going on, and Horatio explains to him that Hamlet and Fortinbras both have sons with the same names as themselves, but tells Marcellus that Hamlet Sr and Fortinbras Sr both fought, while a treaty said that whoever vanquished the other would have that person's land. Hamlet Sr bests Fortinbras Sr and therefore legally gains the land, however Fortinbras Jr has hired thugs to protect the land that is rightfully now Hamlet Sr's.
2. "And prologue to the omen coming on"