It cannot be expected that you will go in for such a long disquisition at a moment when you are called upon to act, but you should have considered these points beforehand, at all events to such an extent that you would have decided to open fire when the enemy was still at comparatively long ranges, but to increase this fire as lie got closer and to reserve the maximum rate of fire until you can pour it in with deadly effect. You must always remember that you are dealing with human beings who have nerves and not with machines. As I have previously said, the above principles should be those on which you decide to act, but the first thing you should do would be to send to the officer commanding the section of guns and inquire from him the ranges of any objects within rifle shot which he has ascertained, and you should at the same time desire him to obtain for you the ranges of any other prominent objects near which the enemy must pass, so that if his remaining guns are knocked out you will know what sights to use. Whilst this is being done, you should divide your front between your platoon commanders. The Lewis guns should remain with their platoons, but you would be wise to keep the Vickers Maxims under your own special command, so that you can turn them on to any portion of the advancing line which seems especially to threaten you. In fact, you should look on these as your reserve. Having thus considered the situation, you should issue the following orders: “Fire fronts are allotted as under: No. 1 Platoon to the right of Farm _U_. No. 2 Platoon from farm _U_ to _Y_ tree. No. 3 Platoon from _Y_ tree to farm _W_. No. 4 Platoon to the left of farm _W_.” _Order_ No. 2.--“Ranges are being ascertained from the artillery and will be passed to platoon commanders. Platoon commanders can open fire at their own discretion, but must bear in mind the enormous importance of being ready in all respects to use the full power of their fire should the enemy succeed in getting to close ranges. The four Vickers Maxim guns will, under my orders, fire at any portion of the enemy’s advance which appears to be especially threatening.” The majority of regimental officers now serving do not at all appreciate the enormous effect of rifle and machine-gun fire at medium and long ranges, nor the importance of taking every step in their power to obtain the accurate ranges as soon as they have taken up a position. The effect of the fire of a fairly good company in such circumstances as those above depicted and acting on the above carefully considered fire orders would be enormous, whereas if the fire fronts were not properly allotted and if ranges were unknown, it would be of comparatively little value. Your affectionate father, “X. Y. Z.” LETTER XII [Illustration] _February 20, 1918._ MY DEAR DICK,-- What would you do in the following circumstances?