Answer:Macbeth’s character changes a great deal over the course of the play. At the beginning of the play, Macbeth is a respected Thane who has shown great loyalty to King Duncan. Soon after, Macbeth succumbs to ambition and, encouraged by a prophecy and Lady Macbeth, murders King Duncan to take his throne. This betrayal throws Macbeth into a state of guilt and fear, prompting him to murder again and again to satisfy his paranoia. By the end of the play, he has become an evil tyrant and is rightfully deposed and killed for his crimes.
I believe that the first thing that cast doubt on the authenticity of the king being Peter Wilk's English brother is his illiteracy and inability to write. He struggles with the word funeral obsequies, instead he says funeral orgies.