One serious gap in the history of the war remains to be filled by a comprehensive account of the origin and growth of the temporary departments. Their number is to be reckoned by the score, their strength by scores of thousands; in function they ranged from encouraging thrift and translating enemy newspapers to ordering heavy artillery, commandeering ships and controlling the supply, distribution and price of food. Some were vast expansions of a sub-department in Foreign Office, Admiralty, Board of Trade or War Office, others--like those of Food and Shipping--were created by a minister out of a museum or hotel, a private telephone-exchange, a code of instructions, a supply of official stationery and an assortment of male and female clerks; some were set to function by an old civil servant borrowed from another office or resuscitated from retirement, others evolved their system by imitation or by the light of nature. If in five years there was a heavy bill to pay for overlapping and waste, for errors of judgement and blunders in execution, for interdepartmental warfare and magnification of private bishoprics, any one who saw the temporary civil service from the inside may feel that it was yet light in relation to the multiplicity of interests involved and to the amount of work accomplished. In its genesis and development, the Trade Clearing House of the War Trade Department[31] was typical of most temporary offices. On the outbreak of hostilities, the National Service League found itself with premises, furniture, a staff and a number of at least temporarily obsolete functions. For a time a special censorship was established in connection with the Admiralty; one recruiting officer scoured the clubs of London, another the colleges of Oxford until a big and varied personnel had been collected; when more hands were required, each of the original members would recruit a friend, for whom he could vouch. As the work of the department was concerned with every kind of export trade, no one was admitted who could turn to private account any knowledge that came to him in his official capacity; and, though military service was not yet compulsory nor departmental exemption the desire of the gun-shy, the recruiting for the office was almost entirely confined to men who were over age or unfit.