Papers of Pulitzer Prize-winning Chicago Tribune reporter Bill Mullen, who in the 1970s worked undercover for the Chicago Board of Elections, and covered the end of the Vietnam War, OPEC, the SALT treaties, and famine in Africa; and in the 1980s investigated political refugees. As a world traveler, he wrote extensively about his excursions, particularly to Antarctica. He later became well-known around Chicago for his coverage of the city's cultural institutions.