The current manor house was built some time after 1947 by Sarah Diodati Gardiner, who was descended from Lion Gardiner the First in three ways. The previous manor house was built by David Gardiner in 1774 and burned to the ground in 1947; it was thought after a guest fell asleep while smoking. Valuable antiques were destroyed in this fire, while the caretaker saved his own life by jumping from a window. Sarah Gardiner erected a new 28-room manor house in the Georgian style. She died in 1953, still unmarried, at age 90. From 1955 until 1963, Sperry Rand leased the island for top echelon meetings. Sarah Gardiner was a multimillionaire and left the island estate to her nephew, Robert David Lion Gardiner and his sister, Alexandra Gardiner Creel. They took possession of the island at the expiration of Sperry Rand's lease in 1963.