What is a subtext? You may think of it as a movement in the circumambient language, whose presence you divine by distortions and ripples in the text; what lies between the lines is as invisible, as plain to the eye as the breeze which stirs the leaves of the copper beech in the quadrangle, the high wind that toppled trees in Hyde Park. And we know that the disruption is not in one direction only: the text is a kind of windbreak.