The storm had been gathering over the city all afternoon and it was almost dark in Post Office Square outside the windows of my building. The gathering gloom had kept making me think that it was later than it really was and that I should be going home, but I’d managed to ignore it and get some work done. Suddenly, though, I noticed that it was five o’clock; at a push, I could get the 5:10 bus and be home before the storm struck