Who is the “they” Macbeth refers to in his letter to Lady Macbeth?

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favoritethings eNotes educator| Certified Educator

Macbeth begins his letter to his wife, Lady Macbeth, with a description of his encounter with the Weird Sisters. The "they" he refers to when he says, "'They met me in the day of success, and I have learned by the perfectest report they have more in them than mortal knowledge," refers to these three witchy women. He explains that he came upon them after winning on the battlefield, and though he tried to ask them more questions, they disappeared before his eyes.  After this, a messenger from Duncan came to tell him that he has been awarded the title Thane of Cawdor, which the Weird Sisters had prophesied. Macbeth says that he wants to let his wife know about these events so that she can begin to anticipate their happy fates. He calls her his "dearest partner of greatness" and seems, genuinely, to care for her and her happiness.