Sheraton was apparently a man very well educated for his time, whether self taught or not one cannot say; but that he was an excellent draughtsman, and had a complete knowledge of geometry, is evident from the skilful drawings in his book, and the careful though rather verbose directions he gives for perspective drawing. Many of his numerous designs for furniture and ornamental items are drawn to a scale with the geometrical nicety of an engineer's or architect's plan. He has drawn in elevation, plan, and minute detail, each of the five architectural orders. [Illustration: CHAIR BACKS, FROM SHERATON'S "CABINET MAKER."] The selection made here from his designs for the purposes of illustration, is not taken from his later work, which properly belongs to a future chapter, when we come to consider the influence of the French Revolution, and the translation of the "Empire" style to England. Sheraton published "The Cabinet Maker and Upholsterer's Drawing Book" in 1793, and the list of subscribers whose names and addresses are given, throws much light on the subject of the furniture of his time.[19] Amongst these are many of his aristocratic patrons and no less than 450 names and addresses of cabinet makers, chair makers, and carvers, exclusive of harpsichord manufacturers, musical instrument makers, upholsterers, and other kindred trades. Included with these we find the names of firms who, from the appointments they held, it may be inferred, had a high reputation for good work, and a leading position in the trade, but who, perhaps from the absence of a taste for "getting into print" and from the lack of any brand or mark by which their work can be identified, have passed into oblivion while their contemporaries are still famous. The following names taken from this list are probably those of men who had for many years conducted well known and old established businesses, but would now be but poor ones to "conjure" with: while those of Chippendale, Sheraton, or Hepplewhite, are a ready passport for a doubtful specimen. For instance:--France, Cabinet Maker to His Majesty, St. Martin's Lane; Charles Elliott, Upholder to His Majesty and Cabinet Maker to the Duke of York, Bond Street; Campbell and Sons, Cabinet Makers to the Prince of Wales, Mary-le-bone Street, London. Besides those who held Royal appointments, there were other manufacturers of decorative furniture--Thomas Johnson, Copeland, Robert Davy, a French carver named Nicholas Collet, who settled in England, and many others.