“Grumble mumble.”

“Pardon me?” said Ms. Jane.

“Mumble grumble.”

“Do speak up, dear,” said Ms. Jane.

“Grr rumble mumbly.”

“Really, it’s very rude to mumble like that,” said Ms. Jane. “You’ve been raised to know better!”

But Ms. Jane’s stomach, it turned out, was a very poor student of etiquette.