FaceBook is a funny thing — I have deeply mixed feelings about it although I do like being in a sort of everyday casual contact with lots of old friends. On Saturday, when I was in between garden chores, I checked in to see what was happening and my old friend Sean O’Grady had posted Jim Houston’s obituary in the New York Times. I had no idea he’d been ill, and was just shocked that he’s gone. Jim was a tall, gentle man who you could count on to give you a true reading of your work. The very first…