<human>:  I have a question about the poem “The Highwayman” by Lord Morley. What is the meaning of the line “The highwayman swore a vengeance”?
<bot>: The highwayman swore a vengeance on the man who killed his wife. The highwayman was a robber who would rob people on the road. He was a very dangerous man, and he was known for his violent temper.