“In came a fiddler with a music-book, and went up to the lofty desk, and made an orchestra of it, and tuned like fifty stomach-aches.”
So begins the famous description of Mr. Fezziwig’s Christmas Eve ball in Charles Dickens’ 1843 novel, A Christmas Carol, the full text of which with the original illustrations, including the one shown at left (click to enlarge), may be found at Project Gutenberg.
This is a fun example of, at least, a Victorian writer’s conception of a late 18th century ball which, though given by a successful businessman, is very much of the middle and lower classes rather than of the nobility. Given that Dickens’ family was not wealthy (at one point they ended up in a debtors’ prison), he may have been writing more from personal experience in London in the 1830s than, say, careful research about ballroom practices several decades earlier. So while this is a useful historical document for dance history, which period it is useful for is not entirely clear.

