he got off the bus in the early hours of the following morning and stood just inside the door from the loading-gate , surveying the echoing , high-ceilinged terminal , trying to put aside his cop 's assessment of the pimps and the whores , the buttboys and the beggars , trying to see it as she must have seen it , getting off this same bus and walking into this same terminal and seeing it at this same hour , when human nature is always at low tide .