Sydney's booming commercial area. The purchase of its own offices was a forerunner to the conclusion of the Fund's first decade of operations during which the original staff of 10 increased to 75 and annual revenue had grown from £31,757 at 30 June 1933 to £364,180 at 30 June 1942. The war years and beyond 1942–1952 The 1942-52 decade of the Fund's development began at the height of the World War II. During these years MHCF House was never left unattended, day or night, in compliance with National Emergency Services regulations. An air raid shelter was built in the basement and the entire male staff of 24 was formed into a voluntary patrol to protect the building. On the night of 7 June 1942 when Japanese submarines shelled Sydney, a contributor in Bellevue Hill was struck by a shell fragment and admitted to St Vincent's Hospital. In due course a claim (No. H711683) was paid in respect of this injury. Despite many difficulties of the World War II years, including the severe drain on manpower resources and the cessation of many employment groups, the Fund's revenues continued to grow, indicating the high value now placed by the community on an equitable and efficient hospital insurance system. By 30 June 1945, it had an income of £440,000. In 1945, the Fund extended its area of operations to cover the whole of New South Wales. In 1946, due approval was obtained from the State Government and the name of the Fund was changed to the Hospitals Contribution Fund of NSW. A scheme for a medical benefits fund, to provide insurance against the costs of medical services, had been envisaged by then MHCF and members of the medical profession in 1939 but had been deferred because of the war. However, in 1947, under the sponsorship of the medical profession, the Medical Benefits Fund of Australia(MBF) was formed, The well-established HCF accepted its invitation to be managing agents for the new fund. By early 1947, HCF's annual income was well past the £500,000 mark and its cover extended to more than 1,250,000 people in NSW. To accommodate continued rapid growth, HCF purchased the Catton Building at 199 Liverpool Street, in January 1950. Meanwhile, in 1952, income had risen to £671,633 – a twenty-fold increase in 20 years – and grants to public hospitals and medical charities exceeded £100,000 for the year. The years of