no circumstances will he yield it to any other person. Unless
necessity therefor exists, no person will require a sentinel to
quit his piece, even to allow it to be inspected.

171. A sentinel will not divulge the countersign (pars. 209 to
217) to anyone except the sentinel who relieves him, or to a
person from whom he properly receives orders, on such person's
verbal order given personally. Privates of the guard will not
use the countersign except in the performance of their duties
while posted as sentinels.

No. 7: To talk to no one except in line of duty.

172. When calling for any purpose, challenging, or holding
communication with any person a dismounted sentinel armed with
a rifle or saber will take the position of port arms or saber.
At night a dismounted sentinel armed with a pistol takes the
position of raised pistol in challenging or holding communication.
A mounted sentinel does not ordinarily draw his weapon in the
daytime when challenging or holding conversation; but if drawn, he
holds it at advance rifle, raise pistol, or port saber, according
as he is armed with a rifle, pistol, or saber. At night in
challenging and holding conversation his weapon is drawn and
held as just prescribed, depending on whether he is armed with
a rifle, pistol, or saber.

No. 8: In case of fire or disorder to give the alarm.

173. In case of fire, a sentinel will call, "Fire, No. (----),"
adding the number of his post; if possible, he will extinguish
the fire himself. In case of disorder he will call, "The Guard,
No. (----)," adding the number of his post. If the danger be
great, he will in either case discharge his piece before calling.

No. 11: To salute all officers and all colors and standards not
cased.

174. When not engaged in the performance of a specific duty,
the proper execution of which would prevent it, a member of the
guard will salute all officers who pass him. This rule applies
at all hours of the day or night, except in the case of mounted
sentinels armed with a rifle or pistol, or dismounted sentinels
armed with a pistol, after challenging. (See par. 181.)

175. Sentinels will salute as follows: A dismounted sentinel armed
with a rifle or saber, salutes by presenting arms; if otherwise
armed, he salutes with the right hand.

A mounted sentinel, if armed with a saber and the saber be drawn,
salutes by presenting saber; otherwise he salutes in all cases
with the right hand.

176. To salute,