A BRIEF PERSONAL NOTE: Sorry for scaring people a week ago, with a medical emergency.  No, we’re still not absolutely sure what caused it, but we’re accumulating an impressive list of ways in which I am perfectly healthy.  Not all test results are back, but at this point there’s no reason to be worried.  After taking it easy for a week, I hope to be more regular here in the evenings. Thank you to everyone who sent good wishes.