Files, 1910-1923, (fols. 1-64) 'Ireland and Home Rule' printed papers on the situation in Ireland, 1910-1923; (fols. 65-249) 'The institution and early work of the Costings Department', correspondence and papers, 1915-1916, relating to finance of munitions work, including establishment of a Director General of Munitions Finance, and discussion of cost accounting with Sir Hardman Lever and Frederick Black, and (fols. 250-325) 'The setting up of the Costings Department', including appointment of Sir Hardman Lever as Assistant Financial Secretary and memorandum by Addison on organisation of Supply Departments, 1915-1916.