Following the footsteps of early explorers, an xpedition party travels by camel through central ustralia to lay bare the secrets of arid lands.THE SHARD OF SANDSTONE LOOKS FRAGILE in Andrew Harper's callused hands.Kneeling in the sand like an archaeologist at a dig, his battered Akubra pulled low over his face, he cradles the find with great care. After gently brushing away the sand as if it were dust on a countertop, Andrew turns the stone over and traces the gentle grooves on its underside.
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