In its response to the application, the West of Scotland Archaeology Service states: ‘Both the walled garden to the south-east of the castle and the sundial that sits within it are also A-listed.
‘A carved stone at the entrance to the garden indicates that it was constructed in 1710, when it was built for Duchess Anne of Montrose as a kitchen garden. It later served as a tree nursery, and was laid out as a pleasure garden in the mid- 19th century at the same time as the earlier 19th century extension to the castle was built.
‘A photograph of circa 1900 shows a pavilion on the site now occupied by the sundial. The sundial is a composite piece consisting of an 18th century baluster, with a specially- made plinth and 19th or 20th century brass dial. It was purchased in 1908, at the time the new rose garden was sunk.