(b) The =Digging= of small =Ditches= and the =Breaking= up of the =Surface= of the =Ground= in front of our position is an effective way of preventing bombs from rolling towards our position. (c) The adoption of shallow =Sleeping Pits= in the rear of our trenches to provide quarters for the reliefs has been proven a success. (d) Trenches should not be made wider or deeper than is absolutely necessary, as the effect of high explosives in deep trenches is much more deadly than in shallow ones, and the highest part of the parapet and parados should be next to the trench and sloping slightly from the trench, the idea being not to aid bombs in rolling into the trench. (e) Bomb and splinter proof shelters may be built over keeps, trenches and other strong places. (f) The use of sapheads from which bomb fire is provided to keep the enemy from getting into bombing range of our positions. (See Fig. 1.) (g) =Obstacles= should be placed in front of our trenches at sufficient distance when possible to prevent enemy throwing bombs into the latter from behind these obstacles. This will disallow of bombing covering fire for their wire cutters. =Storage of Bombs in Trenches.= Each platoon commander in the trenches is responsible that he has a supply of bombs and grenades and procures the same from the brigade bombers’ magazine, which is located anywhere from 1,500 to 2,500 yards in the rear of the front line trenches. They are stored in the trenches in bomb and splinter proof pits provided for that purpose.