=99.= Prisoners when paraded with the guard are placed in line, in its center. The sergeant, immediately before forming the guard, will turn over his keys to the noncommissioned officer at the guardhouse. Having formed the guard he will divide it into two nearly equal parts. Indicating the point of division with his hand, he commands: 1. =Right (or left)=, 2. =FACE=, 3. =Forward=, 4. =MARCH=, 5. =Guard=, 6. =HALT=, 7. =Left (or right)=, 8. =FACE=. If the first command be =right face=, the right half of the guard only will execute the movements; if =left face=, the left half only will execute them. The command =halt= is given when sufficient interval is obtained to admit the prisoners. The doors of the guardroom and cells are then opened by the noncommissioned officer having the keys. The prisoners will file out under the supervision of the sergeant, the noncommissioned officer, and sentinel on duty at the guardhouse, and such other sentinels as may be necessary; they will form in line in the interval between the two parts of the guard. =100.= To return the prisoners to the guardroom and cells, the sergeant commands: 1. =Prisoners=, 2. =Right (or left)=, 3. =FACE=, 4. =Column right (or left)=, 5. =MARCH.= The prisoners, under the same supervision as before, return to their proper rooms or cells. =101.= To close the guard, the sergeant commands: 1. =Left (or right)=, 2. =FACE=, 3. =Forward=, 4. =MARCH=, 5. =Guard=, 6. =HALT=, 7. =Right= (or =left=), 8. =FACE.= The left or right half only of the guard, as indicated, executes the movement. =102.= If there be but few prisoners, the sergeant may indicate the point of division as above, and form the necessary interval by the commands: 1. =Right= (or =left=) =step=, 2. =MARCH=, 3. =Guard=, 4. =HALT=, and close the intervals by the commands: 1. =Left= (or =right=) =step=, 2. =MARCH=, 3. =Guard=, 4. =HALT.= =103.= If sentinels are numerous, reliefs may, at the discretion of the commanding officer, be posted in detachments, and sergeants as well as corporals required to relieve and post them. =Section 6. Corporal of the Guard.= =104.= A corporal of the guard receives and obeys orders from none but noncommissioned officers of the guard senior to himself, the officers of the guard, the officer of the day, and the commanding officer. =105.= It is the duty of the corporal of the guard to post and relieve sentinels and to instruct the members of his relief in their orders and duties. =106.= Immediately after the division of the guard into reliefs the corporals will assign the members of their respective reliefs to posts by number, and a soldier so assigned to his post will not be changed to another during the same tour of guard duty unless by direction of the commander of the guard or higher authority. Usually experienced soldiers are placed over the arms of the guard and at remote and responsible posts.