I started out the morning by going to the visitor center, since there seemed to be a consensus that that was the place to go, but it turned out to be little more than a ticket counter for the many commercial tours available: you can see the historic district on foot, on a rented bike, in a horse-drawn carriage, or in a noisy diesel bus made to look like a trolley.
My second stop was City Market, which I hoped would be a farmers' market, but it's a pedestrian mall. An Internet cafe there let me plug into the phone line, and I caught up with my e-mail over coffee.