The storeroom — or perhaps more accurately 'junk room' — occupies a large slice comprising over half of the third floor. There are two doors, one at each end of the angled corridor which divides this storey of the tower, and from either door it is theoretically possible to forge one's way inwards in order to meet more or less in the middle of the room; but to get from end to end of the storeroom it is normally much quicker to go round the outside, along the corridor.

The reason for this is, quite simply, that the room is piled high with stored and discarded items. Very little here is ever thrown away. Boxes and crates await their turn to be shipped off to new destinations; a chair with a wobbly leg anticipates a day when it may possibly be mended; hooks, locks, keys and handles from furniture long since broken up nestle rusting in cardboard boxes; battered pans and odd crocks are laid up in store against some future need; spare copies of books and those that have been long unread moulder gently beneath a table that is paint-stained and marked by a careless saw.

It is hard to imagine how some of these items ever made it in through the doorway in the first place, quite frankly, let alone up the stairs. There is a splintered wardrobe on its side against the back wall, though only those who had known it in its younger days would recognise it for such now, sans doors and feet. Instead, it has become an open-fronted dark cavern that has played a leading rôle in half a hundred children's stories, from prison cell to ship's hold to Aladdin's cave. There is also a vast roll of red carpet that might once have been rich enough to have carried Cleopatra herself, and what appears to be simply a pile of long rough-sawn planks.

The smaller items are on the whole more useful. When a slender, rigid metal rod is required to poke a lost treasure out from an awkward crevice, or a length of sturdy sash-cord is needed to tether a heavy object, or a drop of varnish wanted in order to touch-up some exposed woodwork, it is the storeroom that is always the first port of call.