himself moved into John Daw's corner house and on his death the property was purchased by Dr Hugh LLoyd who had a nearby surgery on South Road in Clovelly Park which later became the Clovelly Park Community Health Centre. The increasing use of motor vehicles in the 1920s led to the subdivision of several farms in the area into the estates of St Marys Park, Castle Estate, Clovelly Gardens and South Road Estate. The Great Depression of the 1930s followed by World War II stifled land sales and by 1949 only 25 people were living in the estates. The land set aside for Kiley Reserve in the subdivision of Clovelly Gardens had already been used by the Darlington Motorcycle Club since 1920 for races and in 1930 the remainder of the subdivision was converted to a trotting track. In the 1940s the South Australian Housing Trust then bought the unsold blocks in St Marys to provide low cost housing for workers. Kiley Reserve was later acquired by the State Government for the South Road Primary School which was built in 1951. By 1960, the South Australian Housing Trust had built nearly 400 homes in St Marys. Construction of the Chrysler vehicle manufacturing plant in Tonsley Park in 1963 led to many support industries being developed in St Marys. An unofficial Post Office was opened on South Road on 16 May 1927 but was discontinued in 1952 when postal services were taken over by a shop at 18 Quinlan Avenue. A purpose built Post Office center was built on South Road St Marys in 1964 with postal services continuing at the shop until 1975 when they were transferred to the South Road office. The South Road office was renamed St Marys South in 1967 and closed in 1976. A Clovelly Park office opened in 1950, was renamed St Marys in 1967 and closed in 1991. In 1964 the Watiparinga Creek was covered as part of the South West Drainage Scheme. A stone bridge built in the 1850s at the northern end of Ragless reserve, which allowed South Road traffic to pass over the creek, was buried when South Road was widened in 1965 and still exists beneath the road today. Springfield Creek also ran through the suburb and was the cause of substantial flooding during heavy rains. In the 1970s the creek was replaced by drainage pipes and covered. St Marys