A warm, relaxing atmosphere reflecting life in South Texas is shown in the mural by James Owen Mahoney, Jr. Allegorical figures symbolize the Gulf and mainland, with attributes of commerce and agriculture against a background of magnolias, palms, oleanders and Spanish moss. The walls of this room are burnished with aluminum leaf, a new material in 1936.
The North Texas Room features a fresco of "Old Man Texas." This popular early twentieth century cartoon character is surrounded by symbols of North Texas. In the center background, a farm stands against a huge bale of cotton. To the left, industry and manufacturing are shown; to the right, wealth and culture of the region. "Old Man Texas" embraces the two major cities of North Texas: Dallas and Fort Worth.
The austere lines of the room reflect the dry plains of West Texas. The ceiling of hand-hewn beams, the adobe walls and the cactus motif on the tile floor, all express this region of the state. For several years the West Texas Room was the Dallas Historical Society Library, but it is no longer used to house any books or artifacts. It is a very large room and all tables and chairs can be reconfigured for a classroom or theater set-up.