21 Rockridge Road for Sir John and Lady Josie Dale Lace. When they fell on hard times it was taken over by George Albu. The present owner is the University of the Witwatersrand. The house was built by specialist craftsmen and masons rather than from manufactured parts which had become popular during the Industrial Revolution. The house possesses some beautiful romantic features like a minstrel gallery and Juliette balconies. Crown Mines Limited, which was founded in 1909 by the combination of seven mining properties, including the Robinson Mine and the Crown Mine, was for many years the biggest producer of gold in the world. It continued mining until 1977. The Rand Club of Johannesburg is the oldest private members' club in Johannesburg, South Africa, and founded in October 1887. The plan for the current, third, clubhouse was put on paper in 1902 and its construction was finished in 1904 on the design by architects Leck & Emley in the Edwardian neo-baroque style. Lord Alfred Milner left South Africa on 2 April 1905 and was succeeded as High Commissioner by the Earl of Selbourne. In January 1906 the Liberal Party in the United Kingdom won the general election and decided to grant the Transvaal responsible government. An election was held in 1907 and General Louis Botha became the Prime Minister of the Transvaal. The various religious organisations were also building their houses of worship. The synagogue was in President street, while the Baptist Church building was in Plein Street. The Central Congregational Church was in Bree Street. The Standard Bank building at the corner of Harrison and Commissioner Streets was completed in 1908. It was built in the Beaux Arts Style, then popular in fashionable areas of London. Among the public amenities provided by the town council in the first decade was the Ellis Park swimming pool, which opened in 1909. The population of Johannesburg increased from 13,027 whites and 78,106 non-whites in 1904 to 24,708 whites and 189,912 non-whites in 1910. In the same period the value of gold produced increased from £15 million to £33 million. In 1909 a National Convention was attended by the four self-governing British colonies in South Africa, namely Cape of Good Hope, Natal, Transvaal and Orange River, to consider closer cooperation. The result was that the British Parliament passed the South Africa Act, 1909 and the said colonies became the Union of South Africa