The Fourth of July is a three-day-event here in Livingston, although this year things kicked off a day early with the unbelievably great concert called “A Song Runs Through It”. It was worth the three hours in the blazing sun to see my beloved Rosanne Cash sing four songs off Black Cadillac“, acoustic, backed up by her friends JD Souther, Victoria Shaw (who was *so* much fun) and Jim Photoglo, friends she then backed up on a selection of their songs. I really love listening to these songwriters talk about their work — there was a lot of talk about…