...Another part of the ritual was to ascend with closed eyes. 'Step, step, step,' came my mother's voice as she led me up - and sure enough, the surface of the next tread would receive the blind child's confident foot; all one had to do was lift it a little higher than usual, so as to avoid stubbing one's toe against the riser. This slow, somewhat somnambulistic ascension in self-engendered darkness held obvious delights. The keenest of them was not knowing when the last step would come. At the top of the stairs, one's foot would be automatically lifted to the deceptive call of 'Step,' and then, with a momentary sense of exquisite panic, with a wild contraction of muscles, would sink into the phantasm of a step, padded, as it were, with the infinitely elastic stuff of its own nonexistence.