ON SUNDAY MORNING, May 19, I was enjoying croissants and coffee with Elaine at the kitchen table, while watching the neighborhood sparrows, finches, cardinals and squirrels have their way with the bird feeder. All was right in our little world, except I was a little wobbly when walking—the result, I suspected, of balance issues caused by an ear infection. It was going to be a busy week, and I figured that it would be smart to get some antibiotics inside me,