midnight
I waited all through Friday , resolved that at six o'clock , if nothing happened , I should make some sort of effort . But from six I remained , with eyes strained towards the doorway , until ten . I was so utterly at a loss , my ingenuity was so entirely baffled by the situation , that I could devise no course of action which did not immediately appear absurd . But at midnight I sprang up -- no longer would I endure the carking suspense . I seized a taper , and passed through the door-way . I had not proceeded far , however , when my light was extinguished . Then I remembered with a shudder that I should have to pass through the whole vast length of the building in order to gain an exit .