I made an interrogative noise.

“You have completely cured me of that ridiculous habit of humming,” he explained.

I think I said I was glad to be of any service to him, and he turned away.

Immediately the train of thought that our conversation had suggested must have resumed its sway. His arms began to wave in their former fashion. The faint echo of “ zuzzoo ” came back to me on the breeze.⁠ ⁠…

Well, after all, that was not my affair.⁠ ⁠…