 On the next Radiolab. Now this is the part where Helen learned her first word water. I spent most of my life feeling constricted by Helen Keller's ghost. I don't blame Helen Keller. Did you really have to write that letter? We don't focus on that. It's not in the past. No. The Helen Keller Exorcism. That's next time on Radiolab. Sunday afternoon at 1 on KNPR and KNPR.org.