She had dressed with more than usual care, and prepared in the highest spirits for the conquest of all that remained unsubdued of his heart, trusting that it was not more than might be won in the course of the evening. But in an instant arose the dreadful suspicion of his being purposely omitted for Mr. Darcy’s pleasure in the Bingleys’ invitation to the officers; and though this was not exactly the case, the absolute fact of his absence was pronounced by his friend Denny, to whom Lydia eagerly applied, and who told them that Wickham had been obliged to go to town on business the day before, and was not yet returned; adding, with a significant smile, "I do not imagine his business would have called him away just now, if he had not wanted to avoid a certain gentleman here."

– Jane Austen

Pride and Prejudice, Chapter 18. Elizabeth’s romantic feelings for George Wickham suffer a setback at the Netherfield ball. Displaying her vanity by dressing "with more than usual care" to capture his heart, she is disappointed to discover that he isn’t there. Immediately her blatent prejudice against Mr. Darcy causes her to blame him for Wickham’s "omission" from the invitation list.