The bridge and the causeway could be reached by a short advance, which raised the question of why this cavalry division had not already taken it. The answer lay half a mile farther down the road, where an old castle rose up above the western end of the causeway. It was little more than a wreck: just four mossy stone walls, with mounds at the corners suggesting towers. But the tops of the walls were furry with musket-barrels, and the surrounding hamlet had been fortified with earth-works. Several roads then radiated westwards from the village. Various Jacobite regiments had positioned themselves short distances up those roads so that they could converge on any force that made it over the causeway and into the killing-zone around the castle.