The work of Edwin Lutyens (1869-1944) includes the Cenotaph in Whitehall, much of Imperial New Delhi and especially his masterpiece, Viceroy's House (now Rashtrapati Bhavan), Queen Mary's dolls' house and Hampstead Garden Suburb. But his greatest heritage is the traditional Edwardian country house, an architectural style he made his own, using local materials and often working with Gertrude Jekyll who planted the gardens for his family homes. This...