Foursquare Exceptional Cask Selection Mark XXXI “Epilogue” is a highly collectible 19-year-old rum that serves as the final, historic chapter concluding Foursquare’s legendary 18-year Exceptional Cask Selection (ECS) series. Crafted by Master Distiller and Blender Richard Seale, it is the oldest age-statement expression ever released by the Barbados-based distillery.