Nobody, we keep telling ourselves, remembers a time quite like this. And that's true even of John Williams, who has seen just about everything in our business. But he did once experience something pretty similar--worse, if anything, strictly in terms of the springtime routines of a stallion farm. That was when Caro imported a wildly contagious venereal disease from France to Spendthrift, and the Department of Agriculture wanted to put a chain on the gate. Williams imagined that he'd already fulfilled his most stressful task, in boarding a plane to...