Who knew that until the middle of the last century, East Granby, Connecticut, was a center for Connecticut Shade, a hand-tended tobacco leaf used as a wrapper for premium cigars? And that the work, which relied a lot on summer migrants, many students from the South, once included Martin Luther King? Keith Scribner knew because he spent a lot of time in East Granby when he was young, and he knows that growing and harvesting tobacco is a back-breaking chore. That he makes this dying industry the