Swimming in the Dark Again

After work I went to the Mitchell pool to get in a swim. Getting into the water at 6:20pm meant that I only had an hour and 40 minutes before the pool closed. I determined to make the best of it and by 7:30, I was surprised by how dark it had become. For the last 30 minutes, I watched the pool, which has no lights, get darker and darker. When I got out at 8, it was dark, but I had been able to swim well over 3 1/2 miles.