 This does not mean, however, that we are blind. For we too saw the polytunnels from the coach on the way in from the airport, and we saw the Africans who work here alone or in pairs, riding their bicycles in the merciless sun, moving between the polytunnels. Peering at them, I leaned my head against the shuddering glass of my window and, as in the fable of the burning bush, saw instead of the Africans a mirage.