109.  When the relief arrives at six paces from a sentinel (see par. 168), the corporal halts it and commands, according to the number of the post:  No. (——.)

Both sentinels execute port arms or saber; the new sentinel approaches the old, halting about one pace from him. (See par. 172.)

110.  The corporals advance and place themselves, facing each other, a little in advance of the new sentinel, the old corporal on his right, the new corporal on his left, both at right shoulder, and observe that the old sentinel transmits correctly his instructions.

The following diagram will illustrate the positions taken: 

A
R —
| | | | | C| |D
| | | | -
B

R is the relief; A, the new corporal; B, the old; C, the new sentinel; D, the old.

111.  The instructions relative to the post having been communicated, the new corporal commands.  Post:  both sentinels then resume the right shoulder, face toward the new corporal and step back so as to allow the relief to pass in front of them.  The new corporal then commands:  “1. Forward, 2.  March”; the old sentinel takes his place in rear of the relief as it passes him, his piece in the same position as those of the relief.  The new sentinel stands fast at a right shoulder until the relief has passed six paces beyond him, when he walks his post.  The corporals take their places as the relief passes them.

112.  Mounted sentinels are posted and relieved in accordance with the same principles.

113.  On the return of the old relief, the corporal of the new guard falls out when the relief halts; the corporal of the old guard forms his relief on the left of the old guard, salutes, and reports to the commander of his guard:  “Sir, the relief is present”; or “Sir, (so and so) is absent,” and takes his place in the guard.

114.  To post a relief other than that which is posted when the old guard is relieved, its corporal commands: 

1. (Such)relief_, 2.  FALL IN; and if arms are stacked, they are taken at the proper commands.

The relief is formed facing to the front, with arms at an order, the men place themselves according to the numbers of their respective posts, viz, two, four, six, and so on, in the front rank, and one, three, five, and so on, in the rear rank.  The corporal, standing about two paces in front of the center of his relief, then commands:  CALL OFF.

The men call off as prescribed.  The corporal then commands:  1. Inspection, 2.  ARMS, 3. Order, 4.  ARMS; faces the commander of the guard, executes the rifle salute, reports:  “Sir, the relief is present “; or “Sir, (so and so) is absent”; he then takes his place on the right at order arms.

115.  When the commander of the guard directs the corporal, POST YOUR RELIEF, the corporal salutes and posts his relief as prescribed (Pars. 108 to 111); the corporal of the relief on post does not go with the new relief, except when necessary to show the way.