Answer September 2021
Click on the images above to see a full-sized image.
The clue (the image on the left) is of a plaque between the upper floor windows of No 9 Market Place, next to the Moot Hall. The clue was extracted from the middle image, which was taken in 1998. The image on the right shows the building in 2020 – a new CCTV camera and the Edinburgh Wool Mill closing down.
The images are from the Market Place gallery in the Photo Archive. Click here to see the full gallery.
GB 1859? If you know what the initials GB refer to, please add a comment below.