Alas, she explains, once the public had seen inside royal drawing rooms, they soon wanted to peer into the bedroom.

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Here the Queen received Society twice a week at formal drawing rooms.

NPR: Excerpt: Princesses

The visitor is warmly greeted at the door and directed into what are essentially four drawing rooms, one with a cozy fire with people sitting around on settees.

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The endless layout includes more than 50 bedrooms, a series of intimate drawing rooms and a regally appointed dining room with an underground passage to a separate kitchen building.

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In discreet cupboards nestled between the double doors of the drawing and smoking rooms, the 5th Earl of Carnarvon once stashed Egyptian artifacts sourced from his archaeological adventures.

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Greenway has been restored to its 1950s heyday and among the rooms now open to the public is the drawing room, Christie's bedroom, dining room and the library.

BBC: Agatha Christie's home Greenway