Ernest L. Edwardes, The Grandfather Clock, 3rd ed., 1971, signed by the author; John Smith, Old Scottish Clockmakers 1453 to 1850, 2nd ed., 1921; Claudius Saunier, Treatise on Modern Horology, modern calf and board binding; Cedric Jagger, Paul Philip Barraud, A.H.S., 1968; H. Alan Lloyd, The Collector's Dictionary of Clocks, 1964; George Daniels, The Art of Breguet, 1974; and twenty other horological reference works (26)