Documents in this series, mostly of the period 1915 to 1922, are those specially appropriated by, or created in, the Ministry's Historical Records Branch for the purpose of preparing the official History of the Ministry of Munitions. It includes some records of the Munitions Committee and Munitions of War Committees of the Cabinet and of the Armament Output Committee of the War Office.
The 'R', 'His. R' or 'His. Rec. R' sequence contains source material for the History acquired from Departments of branches, copied from other Ministry records, and domestic records of the Branch. It consists of consists of schemes for the History; correspondence with Ministers, authors and officials on its compilation; historical notes on departments and activities which sometimes supplement sections of the printed work; series of cables, circulars, office notices, minutes of committees, memoranda and instructions; organisation charts; posters; reports and notes; printed pamphlets, guides and brochures; catalogues and handbooks; statistical tables; and other papers.
The 'H', 'His. H' or 'His Rec. H' sequence consists of schemes for the History, correspondence with ministers, authors and officials about its compilation, and historical notes on departments and activities which sometimes supplement sections of the printed work.
The series also contains unregistered papers that do not fit into either of these classifications but are largely analagous to those in the 'R' sequence. They include minutes of committees, photographs and handbooks.