DARKNESS was falling as Rebus accepted the yellow hard hat from his guide.
“This will be the admin block, we think,” the man said. His name was David Gilfillan. He worked for Historic Scotland and was coordinating the archaeological survey of Queensberry House. “The original building is late seventeenth century. Lord Hatton was its original owner. It was extended at the end of the century, after coming into the ownership of the first Duke of Queensberry. It would have been one of the grandest houses on Canongate, and only a stone’s throw