And sometimes, when the stars are kind, we read with an intake of breath, with a shudder, as if someone or something had 'walked over our grave,' as if a memory had suddenly been rescued from a place deep within us - the recognition of something we never knew was there, or of something we vaguely felt as a flicker or a shadow, whose ghostly form rises and passes back into us before we can see what it is, leaving us older and wiser.