Herbolsheimer, Duncan & Klinefelter, P.C. is a professional corporation whose predecessor firm was established circa 1909 when James Eugene Malone opened his sole practitioner law office in La Salle, Illinois. In 1935, Mr. Malone was joined by George L. Herbolsheimer.

With the exception of the time Mr. Herbolsheimer served in World War II, Eugene and George practiced law until Eugene’s death on July 1, 1949. George carried on the practice as a sole practitioner until September of 1960 when Eugene’s grandson, R. J. Lannon, Jr. (1934-2023), joined him. The partnership between George Herbolsheimer and Jim Lannon was officially formed January 1, 1963.

The firm presently has three attorneys, John S. Duncan, who joined in August 1973, Cote J. Klinefelter, in August 2016, and Megan Rooney-Steben, in June 2025.  Our office is located in La Salle, Illinois.