Lord Banquo /ˈbæŋkwoʊ/, the Thane of Lochaber, is a semi-historical character in William Shakespeare's 1606 play Macbeth. In the play, he is at first an ally of Macbeth (both are generals in the King's army) and they meet the Three Witches together. After prophesying that Macbeth will become king, the witches tell Banquo that he will not be king himself, but that his descendants will be. Later, Macbeth in his lust for power sees Banquo as a threat and has him murdered by three hired assassins; Banquo's son, Fleance, escapes. Banquo's ghost returns in a later scene, causing Macbeth to react with alarm in public during a feast. Shakespeare borrowed the character Banquo from Holinshed's Chronicles, a history of Britain published by Raphael Holinshed in 1587. In Chronicles, Banquo is an accomplice to Macbeth in the murder of the king, rather than a loyal subject of the king who is seen as an enemy by Macbeth. Shakespeare may have changed this aspect of his character to please King James, who was thought at the time to be a descendant of the real Banquo. Critics often interpret Banquo's role in the play as being a foil to Macbeth, resisting evil whereas Macbeth embraces it. Sometimes, however, his motives are unclear, and some critics question his purity. He does nothing to accuse Macbeth of murdering the king, even though he has reason to believe Macbeth is responsible.