The queen said nothing, but went into the bed-room, took all the bedding off the bedstead, and laid a pea on the bottom; then she took twenty mattresses and laid them on the pea, and then twenty eider-down beds on top of the mattresses.
On this the princess had to lie all night. In the morning she was asked how she had slept.
"Oh, very badly!" said she. "I have scarcely closed my eyes all night. Heaven only knows what was in the bed, but I was lying on something hard, so that I am black and blue all over my body. It's horrible!"
Now they knew that she was a real princess because she had felt the pea right through the twenty mattresses and the twenty eider-down beds.
— From "The Princess and the Pea" by Hans Christian Andersen