This is the first example of the character’s action-reaction relationship.
If he collected shells along the beach, Mr Percival went with him, either waddling importantly along at his heels or flying slowly above him in wide circles.
Have a look at these examples.
As she went through the recycle bins, the black cat looked the opposite way, pretending to ignore her but shooting glances in her direction.
He could close all the doors and windows, and the crow would find a way, either dropping down through the old brick chimney, or popping up through the hole in the floor of the laundry.
