two closets for privacy and entertainment and he having a staircase connecting his bedroom to the library above, but Elizabeth appears to have changed her mind while the rooms were being built and eventually each came to have a bedchamber within the other's apartment. This alteration may have been due to the installation of a bathroom downstairs which had to be near the kitchen (the source of hot water) in the basement at the Duke's end of the house. Despite the swap of bedchambers, she retained her original closets at the east side of the house. Closets formed an exclusive and very private end to the sequence into which only the most important guests were invited. Visitors knew that they would only progress through the rooms according to their rank or significance in society: being entertained in one of Elizabeth's closets would have been an honour. Her White Closet was designed for entertaining and had a private door opening onto the Cherry Garden. It was decorated in the most advanced tastes of the day and according to the 1679 inventory that it had "one Indian furnace for tee garnish'd wt silver", a luxury at a time when tea was only beginning to be drunk outside of exclusive royal residences. For this reason, too Elizabeth kept her tea secure in a "Japan box" in her adjoining Private Closet. Upstairs the existing State Apartments (Great Dining Room, North Drawing Room and Long Gallery) were extended with the addition of a State Bedroom apartment. The bedchamber itself was being referred to as "the Queen's Bedchamber" in 1674 which suggests that the Queen, Catherine of Braganza, a friend of Elizabeth's, had occupied it at least once. This was the most important room in the house and the focal point towards which one progressed on the first floor. Another benefit of transforming the house from single to double-pile – a "pile" is a row of rooms, single-pile houses have only one row while double-pile houses are two rows deep, often with a corridor between the rows – had been that it allowed the creation of hidden passages and staircases for servants who could now enter rooms via discreet jib doors rather than by moving through one room to get to another. Michael Wilson notes the "positive warren" of such passages at Ham. The eldest daughter of Elizabeth and Lionel, also named Elizabeth (1659–1735), married Archibald