Les Timbres de Hambourg. By G. Brunel. _Paris_, 1911.
HANOVER. Die Briefumschläge von Hannover. By C. Lindenberg. _Berlin_, 1895.
Hannover (in German). By H. Krötzsch. _Leipzig_, 1893. ⁂ Nine plates.
HAWAIIAN ISLANDS. Descriptive Catalogue of the Postage Stamps of Hawaii. By W. M. Giffard. _Honolulu_, 1893.
Hawaiian Numerals. By Henry J. Crocker. _San Francisco_, 1909. ⁂ Twenty-two plates.
History of the Postal Issues of Hawaii. By Brewster C. Kenyon. _Long Beach, Cal._, 1895. ⁂ Eight plates.
Postage Stamps of the Hawaiian Islands in the Collection of Henry J. Crocker, of San Francisco. By Fred J. Melville. _London_, 1908. ⁂ Eight plates.
HAYTI. The Postage Stamps of Hayti. By Fred J. Melville. _London_, 1905.
HELIGOLAND. Heligoland et ses timbres. By J. B. Moëns. _Bruxelles_, 1897.
Originaux et Réimpressions de Héligoland. By A. Wulbern. _Bruxelles_, 1911. ⁂ Two plates.
HOLLAND AND COLONIES. De Afstempelingen voorkomende op de Postzegels van Nederland. By Schreuders & Co. _s'Gravenhage_, 1897. ⁂ Twelve plates.
Beschrijving van alle Nederlansche Postzegels. [Nederlandsche Vereeniging van Postzegel-verzamelaars.] _Amsterdam_, 1894-5. ⁂ Part I. deals with Holland; II., Dutch Indies; III., Surinam; IV., Curaçao.
Holland. By Fred J. Melville. _London_, 1909.
Perforations Galore. By A. H. Warren. _London_, 1910. ⁂ Plates.
HONG KONG. Descriptive Catalogue of the Postage Stamps and Cards issued by the Hong Kong Post Office. By J. Mencarini. _Amoy (China)_, 1898.
The Postage Stamps of Hong Kong. By B. W. H. Poole. _London_, 1908.
HUNGARY. Die Wasserzeichen der Ungarischer Postwerthzeichen. By Dr. S. Lengyel. _Leipzig_, 1890.
INDIA. The Adhesive Fiscal and Telegraph Stamps of British India. By C. S. Crofton and W. Corfield. _Calcutta_, 1905.
British Indian Adhesive Stamps, surcharged for Native States. By C. Stewart-Wilson. Part I., Chamba, Faridkot, Gwalior. _Calcutta_, 1897. ⁂ Four plates. Part II., Jhind, Nabha, Patialla. _Calcutta_, 1898. ⁂ Four plates. (A revised edition by the same author in collaboration with B. G. Jones, was published in one volume. _Calcutta_, 1904. ⁂ Nine plates.)
The Postage Stamps, &c., of British India and Ceylon. [The Philatelic Society, London.] _London_, 1892. ⁂ Twenty-four plates.