The Listener
Once upon a time there was a man with such delicate ears that he could hear even letters speak. And, of course, letters lying in pillar-boxes have all kinds of things to say to each other.
One evening, having posted his own letter, he leaned against the pillar-box and listened.
"Here's another!" said a voice. "Who are you, pray?"
"I'm an acceptance with thanks," said the new letter.
"What do you accept?" another voice asked.
"An invitation to dinner," said the new letter, with a touch of pride.
"Pooh!" said the other. "Only that."
"It's at a house in Kensington," said the new letter.