It has a centuries’ old history, a cult following and has given its name to a shade of green and so far no one has succeeded in replicating it. Welcome to the world’s most mysterious liqueur Chartreuse but not as we know it: a small Chartreuse bottle, or, as it says on the label "Une Tarragone" and on the metal base Une Chartreuse. It was made in Tarragona and, when given to me in 1988 at the distillery in Voiron, it was thought to date from around 1935. Below is the back of