Two reports on ordnance engineering services in Malaya during the period 1941-1942, written by Ashton following the destruction of all records at Malaya Command in 1942, [1946]; papers relating to the above reports, principally comprising Ashton's report to Air Cdre Modin on RAF Senior Training Corps mechanics attached to the Royal Army Ordnance Corps, Malaya, [1942-1943], an account of ordnance engineering services in Malaya during 1941-1942 by the Assistant Director of Ordnance Services (Engineering), 3 Indian Corps, [1942-1946], reports on ordnance services in Malaya during the period 1941-1942, written for Ashton by Capt E J Coulthard, H J Howland and Lt G A Neale, [1946].

Papers relating to his military career, 1922, [1948], 1950, including letter from Maj Gen W Robb relating to Brown's retirement from King's Own Yorkshire Light Infantry, [1948]; two letters of thanks and congratulation from Gen Sir Allan Francis John Harding, Commander-in-Chief, Far East Land Forces, 1950; two photographs of Brown in Malaya during Operation NAWAB, [1947-1951], one with Harding, the other in the jungle near Guron.

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.