The red-room was a square chamber, very seldom slept in, I might say never, indeed, unless when a chance influx of visitors at Gateshead Hall rendered it necessary to turn to account all the accommodation it contained: yet it was one of the largest and stateliest chambers in the mansion.
Chapter 2 · Narrator
Context
After being locked in, Jane describes the red-room, noting that despite being one of the grandest rooms in Gateshead Hall, it is almost never used except when extra guest space is needed.
Analysis
The sentence's syntax mirrors the room's contradictory status: Jane begins with what the room is not ('very seldom slept in'), interrupts herself to intensify the negation ('never, indeed'), then reverses with an exception clause, before finally arriving at what it actually is ('one of the largest and stateliest chambers'). This syntactic wandering enacts the strangeness of a grand space kept empty, turning size and beauty into something unsettling rather than comforting.
Essay Tip
Support a thesis that Brontë uses physical spaces to embody emotional states—the red-room's grandeur-without-use becomes a spatial metaphor for Jane's own position: conspicuous but unwanted, visible but excluded from the life of the house.