Plate 27s.—Same defended from the rear.
Plate 27t.—Road embankment, defended from the rear.
Plate 27u.—Arrangement of a railroad embankment.
Plate 27v.—Arrangement of a sunken road.
Hedges and woods:
Dig a trench behind the hedge and throw the earth against it; make openings in the hedge to facilitate view and fire . If the hedge is low, deepen the trench, but make the parapet lower than the hedge which masks it.