The Electric Didgeridoo Riverbeds, twisted as the unkempt hair of a homeless person, and framed by an aircraft porthole, form patterns where they meet the sand dunes that are the colour of a peeled sweet potato, and break like waves against other dunes, on a vast waterless coast. Those patterns bring to mind the paintings that humans devised to describe themselves once to strangers coming on ships, and those painters left descendants who have continued to use the methods passed down through the ages, the dabs and points and lines that echo the forms one can see from the air.…