Which building that was in position of Earls of Selkirk until the early 1900s was built by Sir Thomas Maclellan?
Thomas Maclellan of Bombie:  He was responsible for the construction of MacLellan's Castle in the town. MacLellan's Castle:  The family sold the castle in 1752, and from 1782 to 1912 it was held by the Earls of Selkirk.
MacLellan's Castle