In the late 1930s Robert Lion Gardiner, one of East Hampton’s most prominent residents, commissioned the renowned architectural firm Wyeth and?King to create a classic New York mansion for his wondrous 5.4 acres on?Long Island. Today, after a five-year restoration, the stone masterpiece, hidden regally behind high hedges, is a Hamptons treasure. A gated entry, main salon with fireplace, grand dining room, and firelit library are among the noteworthy settings. A commercial kitchen with charming breakfast area and butler’s pantry lend further dignity. But even past the elevator, in the three guest suites, five-bedroom staff or guest wing, and generous firelit master suite, the 1930s spirit richly resonates, complemented in the parklike gardens by a 60-foot swimming pool and heartwarming two-bedroom carriage house.