The Tyrian peers and officers of state For the slow queen in antechambers wait; Her lofty courser, in the court below, Who his majestic rider seems to know, Proud of his purple trappings, paws the ground, And champs the golden bit, and spreads the foam around.
There are no more uses of "antechamber" in the book.
Show samples from other sources
I was escorted to an antechamber where I waited almost an hour.
They went into the antechamber and there, sure enough, the two gentlemen-in-waiting were, sprawling on chairs and snoring hard.
C.S. Lewis -- Prince Caspian: The Return to Narnia