_The Director_: “The sentinels must have imparted to them all
information of the enemy and our own troops. With respect to the latter,
they must be fully informed of the covering patrols that have been sent
out and the location of the adjoining sentinel posts. The location of
the main body of the outguard should be pointed out, and, if
practicable, the position of adjoining outguards.
“They will be given the number of their own post and the number of the
outguard from which they are posted.
“They will be informed as to the points to which the roads and trails
lead, and, if practicable, the names of important topographical points
in sight.
“They will be given the countersign, if one is used. The method of
challenge and identification of persons approaching the outpost
sentinels at night should be changed from time to time so that there
will be less chance for the enemy to know just what system is being used
on a particular night. On one occasion a countersign using the name of a
battle or general may be used; on another night the system of tapping
the knuckles on the rifle stock may be employed.
“The mistake of giving sentinels too many orders and instructions should
be carefully avoided. If their minds are burdened with too many details,
they are likely to become hesitating, timid and confused. The
controlling idea is that they should know where to look for the enemy
and what to do if they see him.”