William Bouguereau The Broken Pitcher painting

Marilla, can I go over to see Diana just for a minute?" asked Anne, running breathlessly down from the east gable one February evening.
"I don't see what you want to be traipsing about after dark for," said Marilla shortly. "You and Diana walked home from school together and then stood down there in the snow for half an hour more, your tongues going the whole blessed time, clickety-clack. So I don't think you're very badly off to see her again."
"But she wants to see me," pleaded Anne. "She has something very important to tell me."
"How do you know she has?"
"Because she just signaled to me from her window. We have arranged a way to signal with our candles and cardboard. We set the candle on the window sill and make flashes by passing the cardboard back and forth. So many flashes mean a certain thing. It was my idea, Marilla."