This section is from the "A Complete Dictionary of Dry Goods" book, by George S. Cole. Also available from Amazon: A complete dictionary of dry goods and history of silk, cotton, linen, wool and other fibrous substances,: Including a full explanation of the modern processes ... together with various useful tables.
Box Coat. Early in the present century an overcoat with a cape, intended for drivers or travelers on the outside of a coach. At present, a short overcoat, usually of a light and delicate color used for attending operas and balls and the like. Sometimes called an Opera coat.