The British Gold Coast heavily influenced the shape that Accra took during this period. For example, racial segregation of neighbourhoods was mandated by law until 1923, and all new buildings were required to be built out of stone or concrete. Despite these regulations, British settlers of the Gold Coast were very hesitant to invest any large amount of money into the city to maintain its infrastructure or improve public works. This did not change until the governorship of Sir Frederick Gordon Guggisberg during which period the three separate settlements (Osu, La and Jamestown) merged to become modern Accra. Guggisberg's administration laid out the present grid networked neighborhoods of Tudu, Adabraka and Asylum Down.