_No. 4. The Carrier._ He follows close enough in rear of the throwers to keep them supplied with grenades, but must be careful not to crowd them or impede the throwing. He will be prepared to instantly take up the duties of the thrower should he become a casualty. _No. 5. N.C.O. or Leader._ He is responsible for his squad and the proper carrying out of the duties given to the squad. He will inspect each man before an attack and see that he has his complete equipment and that he knows the general idea and direction of the attack and the final objective of his squad. He will be responsible for the maintenance of supplies of grenades through his squad to the thrower, and will supervise the automatic filling up of casualties in his squad by men from the squads in the rear. He will indicate the position and progress of his squad in the attack to supporting troops, etc., by means of flags or other signals by day and by colored flares by night. _Nos. 6, 7, 8 and 9._ Their duties are the same as Nos. 1, 2, 3 and 4, and are to be considered primarily as carriers until otherwise employed. _No. 10. Spare Man._ He will act, if necessity arises, as leader of his section, to clear side trenches, etc., and will instantly take over the duties of No. 5 should he become a casualty. _No. 11. Sniper._ He will act as a sniper by day and a connecting file by night, between his own squad and the squad of troops in rear. NOTE. Every man in the grenade squad should be trained to fill the position of any other in the squad. =Explanation of Chart No. A2.= The position occupied by grenadiers in an attacking squad has this main point in consideration. The safety and local protection of each individual in the squad; care should be taken that as far as possible each man has a solid corner of the trench close to him, which he can use as a protection against the bursting effect of enemy grenades, by quickly advancing or retiring around the corner. The bayonet men are in advance of the thrower, close enough to protect him, and not too far in front as to be in danger of being bombed by him. The thrower—the actual means of attack—is protected in front by the traverse and in the rear by the corner of the parados. The carrier is close behind the thrower and is protected by two corners. The N.C.O. or leader is where he can best watch the flight of the grenades thrown by the throwers, and is also equally well protected.