Numismatic Literature. North, J. J., English Hammered Coinage, London, UK, 1963, published by Spink & Son, Volume 1; Early Anglo-Saxon to Henry III c. 650-1272, 198 pages, 16 plates, hardcover with dust jacket, Volume 2; Edward I to Charles II, 1272-1662, 215 pages, 11 plates, hardcover with dust jacket, revised 1975 edition, set of 2 volumes.