The secret door was actually a fake library, whose shelves, as well as books, were fake. While making this mask for the door, Dickens also devised a series of humorous book titles, which occupied the false shelves.
Here are some of those titles: Hansard's Guide to Refreshing Sleep, History of a Short Chancery Suit (in twenty-one volumes), Socrates on Wedlock, King Henry the Eighth's Evidences of Christianity, the series The Wisdom of Our Ancestors: I Ignorance, II Superstition, III The Block, IV The Stake, V The Rack, VI Dirt, and VII Disease.
Among those humorous titles there was also a very narrow dummy volume entitled The Virtues of Our Ancestors.
