It's not a pleasant one to hear. Havelock doesn't hear it often and it seems very alien to Puck in particular.

"I know," he replies after a moment, leaning back and stretching. Optimism doesn't come easily to him, yet he feels the urge to try. "But since I don't appear to be dead yet, I shall keep thinking."

There has to be something. And if there is, he decides, he will find it.