A brief personal coda.  I'm reminded that the last time I was in Boston, we stayed with friends in Watertown.  Even that was more than a decade ago. They still live there, and teach at universities in Boston.  We knew them from Pittsburgh, and we hope they got through all this okay.  Update: We've heard from them, and they did.   

Looking back on these posts, somewhere between a third and a half of what was said was wrong.  At least according to the narratives now.