Lennox and another unnamed lord discuss the events that have unfolded. Lennox seems to think that Fleance has killed his father just as Malcolm and Donalbain are assumed to have hired the guards to kill their father. He thinks that if Macbeth found Banquo's son or the sons of Duncan, he might tear them apart as he did the guards who were smeared in Duncan's blood.
Lennox seems not to suspect Macbeth's real reason for murdering the guards nor why Macbeth would kill Fleance, Malcolm, or Donalbain.
Lennox asks the other thane if he knows that Macduff is now out of favor with the king because Macduff has voiced suspicion at Macbeth's ascension to the throne and because he refused to attend Macbeth's feast the previous night. The other lord explains that Malcolm has gone to England and has been welcomed there by the English king, Edward. Macduff went to ask Edward for help against Macbeth. Macbeth, upon hearing this news, prepares for battle.
