I saw that the passage was a long one, so floundered ahead rapidly in a creeping run that would have seemed horrible had any eye watched me in the blackness; crossing from side to side occasionally to feel of my surroundings and be sure the walls and rows of cases still stretched on. Man is so used to thinking visually that I almost forgot the darkness and pictured the endless corridor of wood and glass in its low-studded monotony as though I saw it. And then in a moment of indescribable emotion I did see it.