 In 1900, Richard D'Oyly Carte bought the hotel, and his family remained in control for the next century.In the 1920s The Berkeley became one of the first London hotels with air conditioning, and in the 1930s double glazing.Ferraro, the "maitre d'hotel" of the Berkeley Grill, was a fixture of London nightlife in the 1920s and 1930s and appears in several novels of the period, such as Dennis Wheatley's "Three Inquisitive People", written 1932 but not published till 1940.