Behold, the Lang courtyard trees! I haven't seen them in eight weeks, and didn't see them yesterday either. My friend J sent me this picture when she drove in from New Jersey to pick up some books: our buildings are being officially sealed off until August. Most of my books are still there, too; I've missed my chance to retrieve them. But I don't know which ones I would have picked up. Just as we're learning how much of teaching can be done online, I'm learning a lot of research can be, too.