Three Silver and one Porcelain Reference BOOKS, "International Hallmarks on Silver", Tardy International Hallmarks on Silver, 1981, soft cover, first few pages have a crease near the spine; "History of Old Sheffield Plate and of the Antique Silver" by Frederick Bradbury, 1968; "Silver" by Richard Came; "Encyclopaedia of British Pottery and Porcelain Marks" by G.A. Godden, 1964, hard cover. (4)