Thus no greater error could be made during reconnaissance exercises than to attach the most importance to encounters between the main bodies, but this mistake is unfortunately frequently committed. It is on the exercise grounds that these mass engagements can and should be learnt. During reconnaissance exercises, however, the strategical conduct of detached columns, and, above all, the handling of reconnaissance organs, should receive most attention. These matters would, of course, be largely influenced by the result of the main action between the masses of the cavalry on either side, and this should be made clear to all concerned; but the manner in which such an engagement is actually conducted by the main bodies is of lesser moment, and all attention should not be centred in it. It is, however, essential that the exercises should be so planned that the mass of cavalry does not advance in close formation in one group, and that the reconnoitring organs are not obliged to carry on the prescribed reconnaissances throughout the manoeuvres within the area originally allotted to them, as would usually be the case where the armies, or their cavalry divisions, advance directly towards one another. This entails but a very elementary form of reconnaissance, and is mainly of use as an exercise in co-operation between the different units. The real difficulties only commence when, during the course of the manoeuvres, the detached columns of the cavalry have to act in concert; when they endeavour to co-operate after one of them has come into collision with the enemy; when, perhaps, the areas allotted to reconnoitring squadrons have been changed; or a success achieved by the cavalry of one side or the other produces entirely new conditions, to which the reconnaissance organs have to adapt themselves independently. These are moments that call for great powers of judgment on the part of the officers, and for skill and resourcefulness on the part of the men, and they are consequently very valuable for instructional purposes. The relief of the reconnaissance organs, hitherto never practised, but highly important, also presents many difficulties of a practical nature. An attempt should be made when arranging exercises to bring about situations of this nature, which will be of great service to the troops, and afford an opportunity of bringing to light cavalry talent among the officers. Though such talent is often to be found amongst the best horsemen or instructors, such is not always the case, and every effort must be made to discover and foster it. The cavalry service is no place for mediocrities, and it is important that the directors of the exercises should be fully qualified to carry out their task, and be free from all dependence upon Regulation or prejudice. The personal equation plays a greater part in the cavalry than in any other arm, yet in no other arm is it, as a rule, so indifferently solved.