"Mr. Bingley had soon made himself acquainted with all the principal people in the room; he was lively and
unreserved, danced every dance, was angry that the ball
closed so early, and talked of giving one himself at
Netherfield. Such amiable qualities must speak for
themselves. What a contrast between him and his friend!
Mr. Darcy danced only once with Mrs. Hurst and once with
Miss Bingley, declined being introduced to any other lady,
and spent the rest of the evening walking about the room,
speaking occasionally to one of his own party."

What is the literary device of the passage ?