The fort stood at the foot of the mountain where the Dreadmoor ridge split apart into the pass. Its builders had made the stone walls broad enough to seal the pass completely.
From two hundred and fifty yards downhill, lying in a hollow with cold seeping through the ground beneath him, Col studied the fortification piece by piece.
The ridge behind the fort gave him the first reference point. Grey rock walls rose on both sides of the pass entrance, with the notch itself showing as a lighter break in the stone. The fort occupied the mouth of that pass as though someone had poured it into the available space and allowed it to harden there.
