This letter from P. S. Magruder, the Executive Vice President of the General Petroleum Corporation, to Arnold O. Beckman, at the time the Chairman of the Los Angeles Chamber of Commerce Air Pollution Committee, expresses Magruder's thanks at being included in a discussion about smog in London. Beckman hosted a luncheon at which Sir Hugh Beaver spoke about similarities between Great Britain's fight against air pollution and the activities being undertaken in Los Angeles. Sir Beaver was a government adviser during the Great Smog of 1952 and as a result was made chairman of the Committee on Air Pollution, which produced the Clean Air Act of 1956.