["Gay Chaps at the Bar" is] A sonnet series in off-rhyme, because I felt it was an off-rhyme situation--I did think of that.  I first wrote the one sonnet, without thinking extensions.  I wrote it because of a letter I got from a soldier who included that phrase in what he was telling me; and then I said, there are other things to say about what's going on at the front and all, and I'll write more poems, some of them based on the stuff of letters that I was getting from several soldiers, and I felt it would be good to have them all in the same form, because it would serve my purposes throughout.