Left Orroroo and drove across flat plains again but my vision is hedged in on all sides by hills. We spent time in Wilmington, a very old town with a toy museum.  The RSL hall is typical of the buildings in Wilmington.  We made lunch at Port Augusta on the Spencer gulf and the Stirling ranges were purple and blue in the gathering gloom of more threatening storms. Outside the town, we saw the  mesa shaped hills of the Tent hills.  These wer eformed by hard silica minerals fusing with the sediments of the sea bed and the hard silica flat tops have survived erosion over thousands of years. Arrived at Woomera for the night.