This red brick building, now McNally's Pub, was the location of St. Charles Office Supply for many years. Built in the 1840s, the structure has served several purposes during its existence. In its early days, the Banking House of Bowman and Baird, law offices, and St. Charles's first "opera house", Minard Hall, were located here. The "opera house", located on the second floor, offered various types of entertainment ranging from concerts, political speeches, plays, comedies, and "Magic Lantern Shows." In the small structure attached to the building was the law office of Judge William Barry. Barry, who moved to St. Charles in 1840, became a well known, honored citizen, and served as county judge. It is rumored that Abraham Lincoln visited the Judge in these quarters.

From the late 1880s until 1906, the first St. Charles Library was located in the former offices of Judge Barry. In 1906, the Library moved into the new Carnegie Building.