How about the box that in 1897 contained the Hand Of Count Petofi.
Oh, that box! A keen eye will see it popping up everywhere throughout the series, on end-tables, mantels, shelves, bureau tops, etc. That box has been to more places than lost luggage on a United Airlines flight.
Speaking of boxes, it always amazed me that the naga box from the Leviathan storyline was rather small, and yet somehow that huge, coffee-table edition of the naga book was crammed into there.
Gerard