“She said to look for a head rock,” Nosuma said, scanning the horizon. Danai Cetywayo had seen them off, telling the archeologist to stop at the head rock just before they got to the Zimbabwe at Regina, the whole village coming out to stand ceremoniously silent behind the N"anga. Nosuma hadn"t asked why they should stop. Not in front of everyone. Such questions at the wrong time or in the wrong place might raise a person"s ire. And I don"t need a powerful N"anga"s curses following me across the savannah, she thought. The main continent of Babwe was a high plateau, stretched between the tropics, the two points of latitude equidistant from the equator created by the axial tilt of the planet, a distance of four thousand miles. Regina sat at the southern end, close to the edge of the high