When the well-dressed stranger appears at their home, what foreshadowing clues are provided that hint at the message that he brings will not be a positive one?

The man at the gate is very hesitant to visit. It is clear that he does not want to do what he has been sent for,

His wife made no reply. She was watching the mysterious movements of a man outside, who, peering in an undecided fashion at the house, appeared to be trying to make up his mind to enter. In mental connection with the two hundred pounds, she noticed that the stranger was well dressed and wore a silk hat of glossy newness. Three times he paused at the gate, and then walked on again. The fourth time he stood with his hand upon it, and then with sudden resolution flung it open and walked up the path. Mrs. White at the same moment placed her hands behind her, and hurriedly unfastening the strings of her apron, put that useful article of apparel beneath the cushion of her chair.