Knop Law, earthwork (Castle Steeds)

In 1732 Horsley noted the existence "near the Chapel houses about a furlong south from Severus's wall, and less from Hadrian's,...the ruins of a rampart. It is usually called the Castle-steeds...it is about four chains long, with an interval in the middle, that looks like a gate...like the south rampart of a small fort". He saw no traces of ramparts on the other sides. MacLauchlan in the mid-19th century declared they were quite destroyed and their outline scarcely visible.