73 Houghton Drive, a beautifully-proportioned example of Edwardian Arts and Crafts style, was designed in 1927 for James and Ethel Gray by Walter and Cyril Reid. James Gray played an important role in the advancement of science in South Africa and was also active in municipal and political affairs, serving as Johannesburg’s mayor in 1947, the year of the British Royal Family visit. Ethel was a meticulous researcher, and partnered with James in writing two important books on the discovery of the Witwatersrand gold fields.