"So I've heard. The waters here are supposed to have a rejuvenating and invigorating effect."

Well, there is no one else around so it is safe to assume that he is being spoken to, of course, the man basking within the hot waters may have been making that comment to himself. That is something else to consider as there is a possibility he was not noticed despite the sound of his steps across the floor as he hurried along, the plan was to continue on. He is busy, still hard at work making sure that no grime or soil waters are left anywhere within this bathhouse.

"I take it you're enjoying yourself after much hard work."

(Surprise, he has no idea how true that statement is.)