On the attack, this would be your perspective: advancing uphill, passing through sharp obstructions, only to face artillery and supporting infantry mounted in the redan. Brigade huts would be across the road, just behind the defenses.
These fortifications must have impressed enemy spies. The British commander, Sir William Howe, wrote home to Lord George Germain that the American positions were "too strong to attack with a clear chance of success."
In the winter of 1778 the abatis would have been a tangled mass of cut trees, with sharpened branches facing toward the enemy.
In the actual encampment, the bristling fence was far more extensive, protecting the entire ? mile Inner Line.
The redan is a small, detached earthwork built forward of the main defenses - to strengthen the line or to cover a vulnerable area.