They will never fire merely to annoy, as this will lead to disclosure of the position, with no adequate result. They will closely examine their shelter and see that the fire opening is so constructed as not to be affected by the blast of the rifle. If shooting through a small aperture in brickwork, the opening should be kept wet to prevent dust being blown out by the discharge. Newly constructed loopholes should be left unused for a time, so as to see if the enemy has detected it. The curtain will always be kept in such position as to prevent light showing through. Snipers must not be led by ruses to fire fruitlessly and disclose their positions. Fire to kill. If a large target is discovered, do not fire if it is possible to inform the machine guns or the artillery. Search constantly for machine guns and snipers; smash his periscopes. Attacks will afford great opportunities for the sniper, as the enemy will then not be so alert for them, being busy with other matters. Less caution will therefore be necessary. From a position on a flank or anywhere that he can fire without interference with our own men, he selects the most useful targets, such as machine-gun men, officers and noncommissioned officers, snipers, artillery observers, etc. He closely observes the flanks, which are favorite places from which to break up an attack, and endeavors to forestall the enemy’s fire. If the attack succeeds, he covers the working parties during the organization of the captured trench and watches for evidences of an intended counterattack. If this is made, he fires on the enemy as he shows himself in the approach trenches, picking off leaders when possible. Much night work for snipers will rarely be advantageous. The targets are then practically limited to patrols and sentries, and there is great danger of firing into our own men or being fired on by them. The flash of the rifle will disclose the position if care is not taken to conceal it. Avoid the enemy’s listening posts. Learn the hours at which the enemy repairs the gaps in his obstacles or parapets and watch for him.