food sent up by a dumb waiter at the spine of the building. In 1937, a restaurant and bar designed by Marcel Breuer and F. R. S. Yorke named the Isobar, located on the ground floor with a decked outdoor area, was added to the building. Its second manager was Philip Harben, who after World War II became the first TV chef at the BBC. Jack Pritchard also set up a supper club called The Half Hundred Club, so named because it could have no more than 25 members who could bring 25 guests. They dined at the Isobar, at Pritchard's penthouse flat in Lawn Road Flats or at more exotic locations, such as London Zoo. The flats and the Isobar became famous as a centre for intellectual life in north London. Residents included the novelist Agatha Christie and her husband, the archaeologist Max Mallowan, the Soviet intelligence recruiter Arnold Deutsch who was the controller of the group of Cambridge educated Soviet spies who came to be known as the Cambridge Spy Ring, the German born economist and Communist Jürgen Kuczynski, the author Nicholas Monsarrat, ethnomusicologist Erich Moritz von Hornbostel, architect Jacques Groag and his textile designer wife Jacqueline Groag, architects Egon Riss and Arthur Korn and the author Adrian Stokes. The British architects Sir James Stirling and Alec Bright, later director of the Museo del Oro in Bogotá, Colombia were resident during the 1960s. Regulars at the Isobar included the sculptors Henry Moore and Barbara Hepworth, the painter Ben Nicholson and Naum Gabo, all who lived locally, as well as Sir Julian Huxley, secretary of the Zoological Society of London 1935–1942. Pritchard remained in London during World War II while Molly Pritchard and their children Jonathan and Jeremy left for America where the children were put in a boarding school in Canada while Molly moved in with Walter and Ise Gropius in Lincoln, Massachusetts. Lawn Road Flats was popular as a residence during the war due to being made out of reinforced concrete, and despite near bombs, survived the Blitz. It was repainted brown during the war as it was feared its white surface would serve as a navigation aid for German bombers. In 1955, Pritchard staged a 21st-birthday party for the building on its roof top terrace. Philip Harben returned to make the food, architectural writer Nikolaus Pevsner made a speech and letters from Walter Gropius, Marcel Breuer