Lady Hartwell, 67, who was widely known on both sides of the Atlantic as an avid patron of politics, fashion and the arts, died early Thursday at Westminster Hospital in London following an illness. The cause of death was not reported.

Together with her husband, Lord Hartwell, the chairman and editor-in-chief of the Daily Telegraph and Sunday Telegraph of London, she ran one of the last of that city's great political salons. Their Cowley Street house in the shadow of Parliament attracted a continual stream of politicians, artists and writers, and was always full of animated conversation.

One of Lady Hartwell's particular passions was American politics. She often timed her trans-Atlantic visits to coincide with presidential campaigns. Since the 1950s, she tried every four years to join each candidate for a time on the campaign trail and became a familiar figure in the planes and buses used by the press.

Appointed a trustee of the British Museum in 1979, Lady Hartwell had previously served as chairman of the British Museum Society. Other museums that benefited from her interest and support included the Victoria and Albert Museum in London, the National Gallery in Washington and the Metropolitan Museum in New York.

The daughter of the first Earl of Birkenhead, she was known as Lady Pamela Smith until her marriage in 1936 to the Hon. Michael Berry, who became Lord Hartwell in 1968. She is survived by her husband, two sons and two daughters.