I've lurked in chat rooms with discussion threads devoted to such subjects as “A previously unknown Albert Goodell brace found in the wild.” One sweltering summer morning, on the Jay County fairgrounds in the farming village of Portland, Indiana, I walked among fabulous machines as small as schnauzers and as huge as elephants, all gleaming in the August sun. Drive belts whirred, flywheels revolved, pistons fired, and a forest of smokestacks piped foul smoke and rude music into the otherwise cloudless sky. Mostly, I have ridden a Midwestern circuit of flea markets and farm auctions in the passenger seat of an emerald green Toyota pickup truck piloted by a fifty-five-year-old botanist with a ponytail, spectacles like windowpanes, and a beard verging on the Whitmanesque.