Aboriginal rock painting of a sailing ship at <a href="https://en.wikipedia.org/wiki/Walga_Rock" target="_blank">Walga Rock Site</a>. <a href="http://www.timbowden.com.au/travel/tims-articles-for-caravanrv-magazine/our-ancient-art-galleries/" target="_blank">Source 1</a>, <a href="https://www.flickr.com/photos/subiyurek/7179972251" target="_blank">Source 2</a>.
