" In the middle of the gravel was a large sign with black latters that said PRIVATE PROPERTY--NO TRESPASSING.

"We'll go ashore," Grandma said. She was very angry. Sophia looked frightened. "There's a big difference," her grandmother explained. "No well-bred person goes ashore on someone else's island when there's no one home. But if they put up a sign, then you do it anyway, because it's a slap in the face. "

― Tove Jansson , The Summer Book