“Twenty –first at Riverside”, the city’s first inner urban mural, was designed by Herb Robb, an artist of the Chilton Group. Located on the 4th Floor of the Central Library in the Research Center, the design is in the form of a mosaic, with 38,400 squares that form the bridge and its surroundings. Macs Abney volunteered to apply paint to each square – a task that took about eight months working nights and weekends – after his regular job which was painting outdoor signs. The mural was first introduced at a public viewing at 4pm on Tuesday, March 3, 1981. Contributors included: Ed Sutherland, Don-Rey Outdoor Advertising Company and Ben Floyd, Fourth National Bank.
Source: Tulsa World, February 27, 1981.