The Sydney Morning Herald (NSW : 1842 - 1954), 11 April 1918, page 7
http://nla.gov.au/nla.news-article15779887
All articles from this newspaper: The Sydney Morning Herald (NSW : 1842 - 1954)
http://archivesoutside.records.nsw.gov.au/can-you-date-this-photograph-hyde-park-sydney/