This fall I set myself a simple project: write songs about the people, places and discoveries that caught my heart, then send each one to the people it was about. Scientists who untangled the cosmos, firefighters and town staff who showed up on a hard day, land trusts, teachers, historians, a trail builder in Boston, a farmer in Hadley. I didn’t know what to expect. Busy people get a lot of email. But the replies kept coming, from Seattle, Nanjing, Ottawa, Chicago, Lima, Sussex and right here in the Valley. Some were a line or two. Some were long, generous letters. A few made me cry. Here are some of my favorites. “By the time I reached the final verse of the song, I was misty-eyed and choked up in public, and I couldn’t have been happier about it.” — Miles Howard, creator of the Boston Boundless Trail on Boundless “It is really terrific: the music, the lyrics… I can almost guarantee that at some point in the near future we will be singing your song.” — Charles McCr...