Note 17 — INTRODUCTION.
Walter Armstrong translation
See upon this subject M. Wolfgang Helbig's Untersuchungen ueber die Campanische Wandmalerei. Leipsic, 1873. M. Boissier has summed up the leading opinions in this matter in an interesting article in the Révue des Deux Mondes, entitled Les Peintures d'Herculaneum et de Pompéi (October 1, 1879).