"Hence Mrs Rouncewell housekeeper at Chesney Wold foresees, though no instructions have yet come down, that the family may shortly be expected, together with a pretty large accession of cousins and others who can in any way assist the great Constitutional work. And hence the stately old dame, taking Time by the forelock, leads him up and down the staircases, and along the galleries and passages, and through the rooms, to witness before he grows any older that everything is ready; that floors are rubbed bright, carpets spread, curtains shaken out, beds puffed and patted, still-room and kitchen cleared for action, — all things prepared as beseems the Dedlock dignity."

What can the "still room" be?