It will be seen that in such simple ways these the fixed agent is able to obtain an immense amount of personal and other information by perfectly simple methods. It may be urged that the greater part of this information could be obtained in legitimate ways and with no expense to the German Government; but the system which Stieber inaugurated is above all things thorough, and there is a system at Berlin of tabulating and card-indexing all information received from fixed posts; of analysing, checking, and comparing, until absolute certainty is reached with regard to the accuracy of detail. For instance, a certain newspaper may announce that the armament of certain fortifications has been increased by a new four-inch gun. A fixed agent will add to this information the position of gun, weight of shell, rate of fire per minute, name of officer in control, and the fact that it is mounted on a disappearing platform--details which are noted and checked with a view to their possible usefulness in the future. The extent of this usefulness may be estimated when the fall of Namur or Maubeuge is recalled. The officers in control of the attacking German batteries knew exactly how many guns they had to silence, the position, bore, and rate of fire of these guns, and the points at which their own batteries could best be placed, with a view to fire effect and invisibility. In the case of Maubeuge they knew more: they knew where to find the necessary concrete platforms on which to place their own heavy artillery, in order to silence the French guns--and this must be attributed to the development of the system of fixed posts. Not only does the Great German General Staff know details of fortifications and technical matters, but it is also kept posted up in the character and abilities of officers who come under the observation of the fixed agent. Reports sent in to headquarters are concerned with personal peculiarities and scandals to an extent undreamed of by the persons concerned. If any officer is open to bribery, the fact is ascertained; if any officer's wife is open to blackmail, the blackmail is instituted, and the price of silence in every case is information with regard to matters of which the husband is cognisant. Further, the topographical information supplied includes details of the nature and state of roads, telegraphs, bridges, depths of rivers and streams, positions of fords, nature and condition of every building and farm, supplies of forage and food, horses available, and every detail which is likely to be of service. The ordnance-maps supplied to German officers are marvels of map-making; every insignificant cottage, stile, clump of trees, and peculiarity of the landscape is indicated, and, by the use of maps of this kind, the march on Paris in 1870 was carried through without a hitch.