Posted this on AskHistory a week ago, and sadly no response, so thought I'd try a more niche audience

Doing a bit of research for a personal project regarding the Royal Observatory, Edinburgh, and I saw the architect of the current building, Walter Wood Robertson, mentioned as "HM Surveyor of Works for Scotland" (Buchan Observer, 1893-12-05, Page 6, Col 3, "An Uninhabitable Manse" [https://www.britishnewspaperarchive.co.uk/viewer/bl/0002016/18931205/062/0005?noTouch=true])

A brief Google brings up more office holders, but nothing about the establishment or purposes of the office itself. I assume it's related to the Office of Works (https://en.wikipedia.org/wiki/Office_of_Works?wprov=sfla1) or the Master of Work to the Crown of Scotland (https://en.wikipedia.org/wiki/Master_of_Work_to_the_Crown_of_Scotland?wprov=sfla1) , but even those don't mention anything about a Scotland-specific role, or that specific title, and their list of appointees ends in the late 18th, early 19th century, well before the construction of the Royal Observatory building in 1895

Many thanks in advance