Question: Walter Scott of Harden (before 1563 – 1629), also known as Auld Wat, was a notorious Border Reiver, what's the name of the 16th century tower house, about 3.5 mi west of Hawick, Scottish Borders?
Sentence (from "Harden Castle"): Harden Castle is a 16th century tower house, about 3.5 mi west of Hawick, Scottish Borders.
Relevant evidence: Yes