"Diathermy," the little doctor muttered.
Harry gave him a five-dollar bill. The doctor gave him two singles in change. "That's certainly reasonable enough," Harry said.
The doctor nodded. "There's a police officer in the hall. He'll drive you home so there won't be any trouble with the travel regulations."
Harry said, "Thanks. Think we'll ever see the end of travel regulations and rationing and all the rest of the emergency?"
"You will, Mr. Burr."
Harry walked to the door.
"We're on an ark," the doctor said.
Harry turned around, smiling. "What?"
"A test, Mr. Burr. You passed it. Goodbye."
Harry went home. He told Edna he felt just great! She said she'd been worried when an officer found Plum wandering on the road; she thought maybe Harry had gone off somewhere and broken travel regulations.