Here is another matter which every horseman ought to know, and that is within what distance a horse can overhaul a man on foot; or the interval necessary to enable a slower horse to escape one more fleet. It is the business rather of the cavalry general to recognise at a glance the sort of ground on which infantry will be superior to cavalry and where cavalry will be superior to infantry. He should be a man of invention, ready of device to turn all circumstances to account, so as to give at one time a small body of cavalry the appearance of a larger, and again a large the likeness of a smaller body; he should have the craft to appear absent when close at hand, and within striking distance when a long way off; he should know exactly not only how to steal an enemy's position, but by a master stroke of cunning (1) to spirit his own cavalry away, and, when least expected, deliver his attack. Another excellent specimen of inventiveness may be seen in the general's ability, while holding a weak position himself, to conjure up so lively an apprehension in the enemy that he will not dream of attacking; or conversely, when, being in a strong position himself, he can engender a fatal boldness in the adversary to venture an attack. Thus with the least cost to yourself, you will best be able to catch your enemy tripping. (1) Or, "sleight of hand"; and for {kleptein} = escamoter see "Anab." IV. vi. 11, 15; V. vi. 9. But to avoid suspicion of seeming to prescribe impossible feats, I will set down, in so many words, the procedure in certain crucial instances. The best safeguard against failure in any attempt to enforce pursuit or conduct a retreat lies in a thorough knowledge of your horse's powers. (2) But how is this experience to be got? Simply by paying attention to their behaviour in the peaceable manouvres of the sham fight, when there is no real enemy to intervene--how the animals come off, in fact, and what stamina they show in the various charges and retreats. (2) {empeiria}, "empirical knowledge." Or suppose the problem is to make your cavalry appear numerous. In the first place, let it be a fundamental rule, if possible, not to attempt to delude the enemy at close quarters; distance, as it aids illusion, will promote security. The next point is to bear in mind that a mob of horses clustered together (owing perhaps to the creatures' size) will give a suggestion of number, whereas scattered they may easily be counted.