4. Put down all necessary details at each _setup_.
5. Note high hills and towns not on immediate route, condition of
roads, fences, cultivation, hedges, cuts and fills, bridges (kind and
length), railroads, telegraph and telephone lines, schools, churches,
etc., notice particularly woods and points of concealment for hostile
troops.

Do the work at each station for elevation, contours and the noting of
necessary details so that the sketch will be complete as you go along.
Make certain that the title of the sketch, scale, orientation, etc.,
are all clearly indicated, for a road map may have to be completed by
another or may be called for suddenly when it will be useless without
these details.

Remember there are but two things absolutely essential to a good road
sketch; a good traverse and the location of the drainage system in its
relation to this traverse. With this control approximate contours can
be drawn by anyone having a knowledge of the principles of topography.
Never plot unimportant details. Prominent buildings and farm houses
are of value for locating oneself. Woods and orchards are shown for
tactical reasons but no one can expect to show every fence, ditch or
bit of cover that might hide a patrol.


Map Reading.

(GETTYSBURG 3" MAP--HUNTERSTOWN SHEET.) Plattsburg Barracks, N.Y.,
Sept. 17, 1917:

1. What is the shortest distance by road from Biglersville to Texas?