Refreshed by their supper the men are ready to turn in at tattoo; by the time ‘taps’ have sounded most are soundly sleeping. But some are awake; if doing their full duty, wider awake than ever they are likely to be in times of peace. The same attention to the bodily comfort of his men which impelled the colonel to give them a long rest at midday and a comfortable meal, applies with increased force to those detailed early in the morning for the night’s guard; during the march these have been spared as far as possible, even being allowed a lift now and then in an ambulance. Such privileges are not granted by a commander who knows his craft as a concession to the laziness, but rather as a preparation for the effectiveness of his men. This is a principle of action, and may apply to business as well as war, that the strong head never withholds reasonable and proper indulgence; the better, it may be said, to enforce at needful times reasonable and proper exertions. As soon as the camp is established the guards are posted. If great precautions were needed during the day, much more are they by night. If fifty were sufficient on the march we need a hundred during the hours of darkness. In the case of a large army an elaborate system of night guards is necessary: First, ‘advanced guards’, occupying strong positions at some distance from the main body; beyond these are the picket guards; further still towards the front what are called ‘grand guards’, from which are thrown forward the outposts, to which the line of sentinels is directly attached. In case of alarm, the sentinels fall back upon the outposts; these upon the grand guards; they, in turn, if necessary, upon the pickets; the necessities of the case and the strength of the enemy’s demonstration determining the movements of the defense, even perhaps to the ‘long roll’ and rousing of the entire army. In our case, no such elaborate system is possible; we content ourselves with outposts and the line of sentinels, all that will be needed, if vigilant, to guard against surprise. The colonel, attended by the officer in command of the guard, will select the sites for outposts. These, five in number, are marked by stars upon the map. The direction from which an attack is most probable is from the ridge (‘R’, ‘R’).