It is also very important to put the divisional cavalry into the field, where possible at full strength, as the difficulties that beset the reconnoitring patrols will only then become apparent. This divisional cavalry need only send out a limited number of these patrols, as they are, as a rule, not absolutely necessary in such exercises, but the work of _screening_ should receive careful attention. The division should therefore be surrounded by a screen of _security patrols_, and all points from which the enemy's patrols might observe the columns should be occupied. If these columns are on the march, the security patrols should advance in "bonds successifs," together with the divisional cavalry, from one line of observation to the next, and thus prevent any possible reconnaissance on the part of the enemy. If the ground on the line of advance is suited to defensive screening, this method should be adopted, and all the enemy's patrols and despatch-riders seen should be hunted down. When the hostile reconnoitring patrols have been driven back behind their own screens or outposts, measures should be taken to prevent their re-issue. If the enemy's patrols endeavour to remain for the night in the vicinity of the troops they wish to keep under observation, they should, if possible, be attacked and captured. When operations are being carried on in friendly country, it will be well to ensure the co-operation of the inhabitants in obtaining information regarding the movements of the enemy's troops. There are always old soldiers to be found among the civil population, who would interest themselves in the matter if called upon by the local magistrates to assist, and who would certainly do their utmost to help their own countrymen and to hamper the enemy. Care should, of course, be taken not to go too far in this direction, as unfortunate consequences might possibly result. It will also be well to send numerous umpires with the army columns and their vanguards, and with the divisional cavalry, and also along the main roads, whose task it will be to conduct the manoeuvres as nearly as possible on the lines of real warfare. Umpires should also be attached to reconnoitring patrols and squadrons, at any rate to those of one side, so that there may be an impartial witness of any encounter. The appointment of these umpires would have the further advantage of providing work at the important points for a larger number of officers, who would thus learn more than they would do when simply marching with their units.