 Hugh Prather's father, Hugh Prather, Jr., grandfather, Hugh Prather, Sr., and great grandfather John S. Armstrong, contributed to the growth of the city of Dallas, Texas.With his father-in-law John S. Armstrong and Armstrong's other son-in-law Edgar Flippen, Prather, Sr., helped plan and build the town of Highland Park, which is now part of the enclave Park Cites surrounded by the city of Dallas.In 1931, Armstrong and his two sons-in-law built Highland Park Village, the first planned shopping center in the United States.