The mind of a parent whose child has gone missing is a place which most parents have tried to visit only briefly, either when their own child vanishes momentarily, as children do, or when other peoples' children disappear. We can attempt to feel ourselves there,out of sympathy, but it is a place of such pain, such suspended emotion, such unplaced and unfocused feeling, that nobody can sense or describe it who hasn't been there. It is a state of no rest and a state of constant, agonised searching and self-questioning.