Image: a group of boys and girls in early 20th century clothing and hats stand in lines in a field with their arms outstretched to either side.
Physical training display in Adelaide, 1913
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Image courtesy of the State Library of South Australia, SLSA: PRG 280/1/39/1, http://images.slsa.sa.gov.au/searcy/39/PRG280_1_39_1.htm, Public Domain.