Catalogue of the Stamps, Envelopes, Wrappers, and Postal Cards of Mexico, including the Provisional Issues of Campeche, Chiapas, Guadalajara, &c. By H. Collin and H. L. Calman, with Albert E. Lawrence. _New York_, 1895.
Los Sobrecargos de los sellos postales de México. By J. Marco del Pont. _Buenos Aires_, 1903. (See also _Campeche_.)
MODENA. I Francobolli del Ducato di Modena e delle Provincie Modenesi. By Dr. Emilio Diena. _Modena_, 1894. ⁂ Seven plates.
The Stamps of the Duchy of Modena and the Modenese Provinces. By Dr. Emilio Diena. _Manchester_, 1905. ⁂ Seven plates. (A revised version in English, prepared by the author from his original work in Italian.)
Timbres des États de Parme, Modène et Romagna. By J. B. Moëns. _Bruxelles_, 1878.
NAPLES. Timbres de Naples et de Sicilie. By J. B. Moëns. _Bruxelles_, 1877.
NEVIS. Nevis. By Fred J. Melville. _London_, 1909.
NEW CALEDONIA. Une réimpression des timbres de la Nouvelle-Calédonie. By A. Maury. _Paris_, 1880.
NEW HEBRIDES. New Hebrides. By Single CA. _London_, 1910.
NEW SOUTH WALES. A History and Description of the Sydney View Stamps of New South Wales. By R. C. H. Brock. _Philadelphia_, 1890.
History of the Post Office, together with an Historical Account of the Issue of Postage Stamps in New South Wales. Compiled chiefly from the Records, by A. Houison. _Sydney_, 1890. ⁂ Fifteen plates.
The Postage Stamps, Envelopes, Wrappers, Post Cards and Telegraph Stamps of New South Wales. By A. F. Basset Hull. Two vols. _London_, 1911. ⁂ Sixteen plates.
The Registration Stamp of New South Wales. By A. Houison. _Sydney_, 1888.
NIGER COAST. Niger Coast Protectorate. By E. J. Nankivell. _Tunbridge Wells_, 1909.
NORTH GERMAN CONFEDERATION. Die Briefumschläge des Norddeutschen Postbezirks. By C. Lindenberg. _Berlin_, 1893.
Norddeutscher Postbezirk mit Occupations-Freimarken. By H. Krötzsch. _Leipzig_, 1893-6.
OLDENBURG. Die Briefumschläge von Oldenburg. By C. Lindenberg. _Berlin_, 1893.
Oldenburg (in German). By P. Ohrt. _Leipzig_, 1893-6.
ORANGE RIVER COLONY. South African War Provisionals. By B. W. H. Poole. _London_, 1901. ⁂ Six plates.
PANAMA. Bartels' Check List of Canal Zone Stamps. By J. M. Bartels. 2nd ed. _Boston, Mass._, 1908.
Bartels' Check List of the Postage Stamps of Panama, 1907. By W. W. Randall and J. M. Bartels. _Boston, Mass._, 1907.