(a) In numbers,
(b) In organization,
(c) In position,
(d) In topography,
(e) In time,
(f) In mobility.
It is a first essential, constantly to note the movements of the enemy,
in order to detect his plans and the exact location of his corps.
These things are the only reliable guides for determining the true course
of procedure. It must be left to the enemy to show by his movements and
the posts which he occupies, the measures he projects for the future, and
until these are known, it is not proper to _ACT_. Hence: