Who saved Kenny from the whirlpool?

Chapter 13 is about Kenny’s reckless decision to swim at Collier’s Landing despite not understanding what a “whirlpool” was; he was annoyed by his brother Byron’s teasingly telling him it was a “Wool Pooh,” or Winnie the Pooh’s evil twin. Kenny goes for a swim there, and he gets pulled under. Not knowing how to extricate himself, he flails around, gets sucked further down, and then has an ominous vision of the hideous Wool Pooh and an angelic girl. Byron jumps in and saves him, which Kenny envisions as Byron fighting the evil Pooh creature. By pulling Kenny from under his chin, Byron manages to drag him to shore. There, his brother shakes the water out of him and first yells at him, then hugs and kisses him, and even cries.