Both changed colour, one looked white, the other red. Mr. Wickham, after a few moments, touched his hat – a salutation which Mr. Darcy just deigned to return.
– Jane Austen
Pride and Prejudice, Chapter 15. Elizabeth is out for a stroll on the street in Meryton. She is astonished at the effect on both Mr. Darcy and Mr. Wickham when they come across each other. Here she describes their shocked faces as their look at each other. She wonders what the meaning of it is.