From start to finish, Nelson never dared to mention William's true identity. The two acted as if they had never met before.
Given that Nelson had said he didn't like staying here, Walker naturally didn't think it was because Nelson felt threatened by William. Thus, Walker sincerely took him at his word and promised to find another place for him to stay.
Alice escorted them to the door. Nelson paused to glance at William, then said to Alice, "I'll come visit another day."
His words were primarily directed at William. William's identity was profoundly mysterious. Nelson had witnessed his capabilities, yet at a glance, William seemed nothing more than an ordinary man. But it was this very enigma that made William appear so unfathomable.
If he ever intended to visit again, he would, of course, have to gauge William's mood.
William, however, didn't even lift his head, much less respond.