The castle, which succeeds an earlier tower which was destroyed about 1590, belonged to the
Homes, but was purchased by the
Scotts in 1501.
Walter Scott of Harden, known as Auld Wat of Harden, was one of this family. He was a
Border Reiver, who married Mary, or Marion, Scott, known as ‘The Flower of Yarrow’, the events surrounding her being retold in the ballad
The Dowie Dens o Yarrow. In the 18th century the family moved to
Mertoun; the house was used as a farmhouse. It was restored and reoccupied during the 19th century. It became the seat of
Lord Polwarth. ==Structure==