Papers relating to his command of 1 Infantry Div, Anzio, Italy, 1944, dated 1943-1962, principally comprising correspondence and memoranda, 1943-1944; diary and typescript diary entries, 1943-1944; operation orders, tactical notes and maps, 1944; written accounts of operations carried out by 1 Div and individual regiments and battalions, 1944; correspondence relating to historical accounts of the landings, 1945-1962, notably Anzio by Wynford Vaughan Thomas (Longmans, London, 1961). Other papers relating to his life and career, 1920-1958, notably including an article by Penney on his service in Wazaristan, India, 1937, reprinted from the Royal Signals Quarterly Journal, Oct 1938 and Jan 1939; memoranda from General Staff, Shanghai, from the City Government of Shanghai and from W R Connor Green, British Embassy, Tokyo, concerning relations between the Chinese and Japanese, and the role of the British garrison in the protection of Shanghai, 1931-1933; diary, 1932, referring principally to matters affecting British troops in Shanghai; press cuttings, [1932]; anti-Japanese propaganda posters produced by the Shanghai Municipality National Salvation Committee to Resist Japan, [1932]; itinerary of Penney's movements in the Middle East and North Africa, 1941-1943; diary, 1943-1944, including description of Allied Forces HQ, Algiers, and reflections on the differences between US and British signals procedure; official and personal correspondence relating to his service as Director of Intelligence, HQ Supreme Allied Commander, South East Asia, [1945].

The MAGIC Documents: Summaries and Transcripts of the Top-Secret Diplomatic Communications of Japan, 1938-1945, is a themed microfilm collection relating to US deciphers of Japanese diplomatic codes through the use of MAGIC decryption, 1938- 1945. The collection contains copies of deciphered official and unofficial Japanese diplomatic communiqués sent from Japanese personnel stationed at embassies and consulates in the Far East, Europe and the Middle East, to Tokyo, Japan, 1938-1945, and includes material relating to Japanese civil, political and economic conditions and policies, military expenditures, strategy, tactics, and campaigns, and eventual peace initiatives and surrender, 1938-1945. Included in the collection are deciphered messages concerning Japanese perceptions of Allied strategy against Japan; the effect of Allied air raids on Japan; Japanese relations with the German Foreign Office; Japanese relations with the governments of Burma, Indo-China; Korea, Netherland East Indies, Siam, China, the Philippines; perceptions of Allied chemical warfare capabilities; perceptions of Allied Lend-Lease naval forces and strategy; British and French relations with colonies in the Far East; control of industry in Manchuria (Manchukuo); perceptions of Axis strategy and Japan's role within it; Japanese interest in Indian nationalism and the Indian Independence League; the Burma-Siam railway; Japanese attacks on the Burma Road, the supply route which connected Burma to Generalissimo Chiang Kai- Shek's nationalist forces in China; administration of the government of Japanese occupied Nanking, China; the Chinese Communist Party; the rationing of clothing and food in Japan; perceptions of the Soviet Comintern Pact; Japanese relations with German, European, and Chinese banks; Japanese relations with Spanish Gen Francisco Franco Bahamonde, the German High Command and Italian Prime Minister Benito Mussolini; interpretation of the Greater East Asia Co-Prosperity Sphere; concern for Japanese nationals abroad, 1937-1945; Japanese naval strategy and tactics; function of the Japanese Consular Police, China; territorial claims on the Kurile Islands; material relating to Japanese military campaigns during World War Two; Japan's search for strategic resources in the Far East; military strengths and dispositions of the German Armed Forces; the origins of the Russo-Japanese Neutrality Pact; Allied and Axis propaganda methods; the treatment of Allied prisoners of war; the surrender of Japanese armed forces in the Far East.