Post Office Central Australia Outposts of Empire VickeryOriginal vintage advertising poster published by the GPO General Post Office for schools to promote the extensive reach of its postal services: Outposts of Empire Central Australia. Colourful illustration by the Australian artist John Vickery (1906 1983) depicting a postman wearing a sun hat in a makeshift Post Office hole in an Australian desert reading a letter with dried out trees behind a sign reading Savings Bank of Australia in red and a sign