“Time, motion, and wine,” the Roman poet Ovid wrote, “cause sleep.” One modern admirer of the author of Metamorphoses, however, might argue the opposite—that wine, at least, or the making of it, usually causes a lack of repose. The classicist Mark Nelson and Dana Johnson, a library-sciences expert, underwent a metamorphosis of their own in 1998, when they sold their company, Ovid Technologies, and bought a 14-acre parcel in the Napa Valley’s Oakville region. With the aid of winemaker and managing partner Janet…