And one of 12 firms so listed in Orlando in 1927, which included Maurice E. Kressly. Soon after arriving in Florida, Roberts attempted to become a member of the Florida chapter of the American Institute of Architects. Letters of recommendation from John Van Bergen, Hermann V. von Holst and Frank Lloyd Wright which accompanied her application make it unmistakably clear that these men who had been her colleagues in Chicago considered Roberts to be an architect. Even so, Roberts was not admitted to the AIA. Nonetheless, throughout the 1920s, the architectural firm of Ryan and Roberts created landmark buildings in Central Florida, some of which still stand, today:   Additional residential and commercial structures by Ryan and Roberts continue to be identified as current owners become more aware of the significance of the contributions these women made to the field of architecture. Isabel Roberts was a member of the St. Cloud Presbyterian Church (another of their commissions, a remodeling of an older structure, it is now demolished) until she moved from St. Cloud to Orlando in the early 1920s, at which time she joined First Presbyterian Church of Orlando. Isabel Roberts and Ida Annah Ryan lived and practiced at their Kenilworth home and studio in Orlando for the remainder of their lives. Isabel Roberts died in Orlando on December 27, 1955 at the age of 84, and was buried in Greenwood Cemetery, Orlando, alongside her mother Mary Roberts and her sister Charlotte Roberts Somerville; none of their graves have markers.