In her silver sequined skirt, faux fur vest, and tall leather boots, Madison Pluck poses on the second-floor stairway landing of the 45-room mansion, Blithewold, in Bristol, R.I. She is on her way to visit some of the dolls from around the world in former owner Marjorie Van Wickle Lyon’s collection. Attending the Daisy Doll tea party at Blithewold, a garden estate on 33 acres overlooking Narragansett Bay, was a present for her eighth birthday. As she climbed down the staircase, with its three different patterns of balusters, to the Colonial Revival entrance hall, Madison asked if people really lived here. Yes, Madison, but no more.