“This is strange indeed! I did not expect such a sight as this! An immense heavy chest! What can it hold? Why should it be placed here? Pushed back too, as if meant to be out of sight! I will look into it — cost me what it may, I will look into it — and directly too — by daylight. If I stay till evening my candle may go out.” She advanced and examined it closely: it was of cedar, curiously inlaid with some darker wood, and raised, about a foot from the ground, on a carved stand of the same. The lock was silver, though tarnished from age; at each end were the imperfect remains of handles also of silver, broken perhaps prematurely by some strange violence; and, on the centre of the lid, was a mysterious cipher, in the same metal. Catherine bent over it intently, but without being able to distinguish anything with certainty. She could not, in whatever direction she took it, believe the last letter to be a T; and yet that it should be anything else in that house was a circumstance to raise no common degree of astonishment. If not originally theirs, by what strange events could it have fallen into the Tilney family?

Chapter 21

I've been trying to find some images which might help you place these objects in your mind's eye.

The picture below shows something like the chest( but I'm not sure the one in Catherine's bedroom was japanned like this one: Catherine's was inlaid with various coloured woods)

However, it was a chest on a carved stand, so this might help you picture it.

The second item of frightening furniture in her room, the cabinet is described thus:

The fire therefore died away, and Catherine, having spent the best part of an hour in her arrangements, was beginning to think of stepping into bed, when, on giving a parting glance round the room, she was struck by the appearance of a high, old–fashioned black cabinet, which, though in a situation conspicuous enough, had never caught her notice before. Henry’s words, his description of the ebony cabinet which was to escape her observation at first, immediately rushed across her; and though there could be nothing really in it, there was something whimsical, it was certainly a very remarkable coincidence! She took her candle and looked closely at the cabinet. It was not absolutely ebony and gold; but it was japan, black and yellow japan of the handsomest kind; and as she held her candle, the yellow had very much the effect of gold. The key was in the door, and she had a strange fancy to look into it; not, however, with the smallest expectation of finding anything, but it was so very odd, after what Henry had said. In short, she could not sleep till she had examined it. So, placing the candle with great caution on a chair, she seized the key with a very tremulous hand and tried to turn it; but it resisted her utmost strength. Alarmed, but not discouraged, she tried it another way; a bolt flew, and she believed herself successful; but how strangely mysterious! The door was still immovable. She paused a moment in breathless wonder. The wind roared down the chimney, the rain beat in torrents against the windows, and everything seemed to speak the awfulness of her situation. To retire to bed, however, unsatisfied on such a point, would be vain, since sleep must be impossible with the consciousness of a cabinet so mysteriously closed in her immediate vicinity. Again, therefore, she applied herself to the key, and after moving it in every possible way for some instants with the determined celerity of hope’s last effort, the door suddenly yielded to her hand: her heart leaped with exultation at such a victory, and having thrown open each folding door, the second being secured only by bolts of less wonderful construction than the lock, though in that her eye could not discern anything unusual, a double range of small drawers appeared in view, with some larger drawers above and below them; and in the centre, a small door, closed also with a lock and key, secured in all probability a cavity of importance.

I have always thought it might look something like this below, the famous Badminton Cabinet.

The deoration on it is not quite right; it would have been decorated more in the style of the chest above.

This cabinet is decorated in pietra dura- hard stones of various hues carved into shapes and inlaid in the wood to create pictures, in this case of birds and flowers and fruit.