Chattanooga, Friday, May 19. Rainy and disagreeable. Was wet all day from 5 to 7. I was on post during one of the most sublime and terrific rain storms I have ever witnessed. Two clouds of pitchy darkness swept down upon us from different directions, enveloping all the surrounding hills and meeting over Chattanooga. Poured rain in torrents with thunder and lightning playing high carnival right in our midst. My poncho was poor defense against such a storm, and I was thoroughly wetted. Feel quite unwell, and will go to bed though it is not dark.