With the amalgamation of light horse regiments , Blackburn was transferred to the 18th/23rd Light Horse Regiment on 1 July 1930 , and to the 18th Light Horse ( Machine Gun ) Regiment on 1 October of the same year . In 1933 , Blackburn became the coroner of the city of Adelaide , a position he held for fourteen years . In this role , he was criticised for refusing to offer public explanations for his decisions not to hold inquests ; it was criticism he ignored . The Australian Labor Party attacked Blackburn 's decision-making as coroner , probably influenced by his involvement with the ESMV in 1928 and his alignment with conservative politics . They were joined by the editor of '' The News '' , who ran several editorials criticising Blackburn . In his role , Blackburn often dealt with deaths of returned soldiers , and murders committed by them . On 6 May 1935 , Blackburn was awarded the King George V Silver Jubilee Medal . He was promoted to major on 15 January 1937 , still with the same regiment , and in the same year was awarded the King George VI Coronation Medal . On 1 July 1939 , a few months before the outbreak of World War II , he was promoted to lieutenant colonel and appointed to command the 18th Light Horse ( Machine Gun ) Regiment
King George VI Coronation Medal
King George VI Coronation Medal
Arthur Blackburn