Twenty minutes later I was on Storrow Drive, the Charles River running by in copper flashes on my right. A couple of Mass. General nurses lunched on the lawn; a man ran over one of the footbridges with a mammoth chocolate Chow beside him. For a moment, I thought of picking one up for myself. Probably do a hell of a lot better job protecting me than Harold the Panda ever would. But then, I didn’t really need an attack dog; I had Bubba. By the boathouse, I saw a group of BU or Emerson students, stuck in the city for the summer, passing around a bottle of wine. Wild kids. Probably had some brie and crackers in their backpacks, too.

I got off at Beacon Street, U-turned again onto the service road, and banged a quick right onto Revere Street, following its cobblestones across Charles Street and up Beacon Hill. No one behind me.

I turned again onto Myrtle Street, the whole street no wider than a piece of dental floss, the tall colonial buildings squeezing in on me. It’s impossible to follow someone in Beacon Hill without being spotted. The streets were built before cars, and I presume, before fat or tall people.

Back when Boston was this wonderful mythic world of midget aerobics instructors, Beacon Hill must have seemed roomy. But now, it’s cramped and narrow and shares more than a little in common with an old French provincial town very pleasing to the eye, but functionally a disaster. A truck stopped for a delivery on the Hill can back up traffic for a mile. The streets are apt to be one-way in a northern direction for two or three blocks, then arbitrarily turn one-way to the south. This usually captures the average driver unaware and forces him to turn onto yet another narrow street with much the same problem, and before he knows it, he’s back on Cambridge or Charles or Beacon Street, looking up at the Hill, wondering how the hell he ever ended up down here again, but getting the distinct, if irrational, impression that the Hill itself threw him off.

It’s a wonderful place to be a snob. The homes are gorgeous red brick. The parking spaces are guarded by the Boston Police. The small cafés and shops are manned by imperious owners who close their doors whenever someone they don’t recognize looks as if he may want to enter. And no one can find your address unless you, personally, draw them a map.

I looked in my rearview as I crested the Hill, the gold dome of the State House peeking out through the wrought-iron fence of a roof garden ahead of me. Two blocks behind me, I saw a car driving slowly, the driver’s head turning left and right as if looking for an unfamiliar address.

I took a left on Joy Street and coasted the four blocks down to Cambridge Street. As the light turned green and I crossed the intersection, I saw the same car coasting down the hill behind me. At the very top of Joy Street, another car appeared a station wagon with a broken luggage rack on the roof. I couldn’t see the driver, but I knew it was Angie. She’d busted the luggage rack with a hammer one morning, pretending the flimsy metal was Phil.