William: What about Alex?
Pat: He's gonna die. Tomorrow. He and his wife at his house. Murphy knows he's coming back to Lincoln tomorrow. They're gonna wait till he's home and go pay a visit.
William: What time are they expecting him?
Pat: Supper time. I figure you were the only fellow with the pluck to get up some McSween partisans and go give the man and his wife a rightful escort across the border.
Pat informs William that Murphy is planning an ambush on Alex McSween and he figured William was the only one that can help Alex get across the border.