Cajun politician and entrepreneur Dudley J. "Couzin Dud" LeBlanc was born on August 16, 1894. He attended Southwestern Louisiana Institute, and during World War I served as a sergeant in the U.S. Army. In 1924 LeBlanc was elected a member of the Louisiana House of Representatives, and in 1926 became Public Service Commissioner. He served as State Senator from 1940 to 1944, 1948 to 1952, and in 1964. In 1945 he established the Happy Day Company, which manufactured the popular Hadacol brand health tonic. Hadacol had 12 percent alcohol, and it guaranteed to cure all ills. LeBlanc promoted Hadacol extensively, sometimes using major entertainers as spokespersons.

An active Cajun culture preservationist, LeBlanc served as president of the Association of Louisiana Acadians, and in the late 1960s helped to establish CODOFIL (Council for the Development of French in Louisiana). He authored three books: The True Story of the Acadians (1927); The Improved Version (1932); and The Acadian Miracle (1966, a revised and expanded version of his first book). LeBlanc appealed to political supporters via radio in Cajun French, at a time when Cajun French was rarely heard on radio. He died on October 22, 1971, and was buried in Abbeville.

The LeBlanc exhibit contains memorabilia from the life and times of "Couzan Dud."