86 Australian Geographic
Trade winds
The curious fi ve.
Kilwa sultanate coins were minted
between the 10th and 14th centuries;
copper ones such as these are most
common, but a few examples of bronze,
gold and silver coins have been found.STORY BY MIKE OWEN
An AG Society-sponsored expedition set out in
July 2013 to solve the mystery of 12th-century
African coins found of Arnhem Land in 1944.
COURTESY POWERHOUSE MUSEUM