s post
toward such person or party and when within about 30 yards will
challenge sharply, "=HALT. Who is there?=" He will place himself in
the best possible position to receive or, if necessary, to arrest the
person or party. (186)

=1747.= In case a mounted party be challenged, the sentinel will call,
"=HALT. DISMOUNT. Who is there?=" (187)

=1748.= The sentinel will permit only one of any party to approach him
for the purpose of giving the countersign (Pars. 1769 to 1777), or if
no countersign be used, of being duly recognized. When this is done
the whole party is advanced, i. e., allowed to pass. (188)

=1749.= In all cases the sentinel must satisfy himself beyond a
reasonable doubt that the parties are what they represent themselves
to be and have a right to pass. If he is not satisfied, he must cause
them to stand and call the corporal of the guard. So, likewise, if he
have no authority to pass persons with the countersign, or when the
party has not the countersign, or gives an incorrect one. (189)

=1750.= A sentinel will not permit any person to approach so close as
to prevent the proper use of his own weapon before recognizing the
person or receiving the countersign. (190)

=1751.= When two or more persons approach in one party, the sentinel
on receiving an answer that indicates that someone in the party has
the countersign, will say, "=Advance one with the countersign=," and,
if the countersign is given correctly, will then say, "=Advance (So
and so)=," repeating the answer to his challenge. Thus, if the answer
be, "=Relief (friends with the countersign, patrol, etc.)=," the
sentinel will say, "=Advance one with the countersign="; then,
"=Advance relief (friends, patrol, etc.)=." (191)

=1752.= If a person having the countersign approach alone, he is
advanced to give the countersign. Thus, if the answer be, "=Friend
with the countersign (or officer of the day, or etc.)=," the sentinel
will say, "=Advance, friend (or officer of the day, or etc.), with the
countersign="; then, "=Advance, friend (or officer of the day, or
etc.)=." (192)

=1753.= If two or more persons approach a sentinel's post from
different directions at the same time, all such persons are challenged
in turn and required to halt and to remain halted until advanced.

The senior is first advanced, in accordance with the foregoing rules.
(193)

=1754.= If a party is already advanced and in communication with a
sentinel, the latter will