Here is a photo mounted on carte
de visite stamped:
'JK Munro, Photographer and Artist, Edinburgh'.
This photo is rather over-size for its
mount. I don't know whether this photo was attached to the mount
originally by the photographer, or whether it was added to the mount
later, perhaps by the owner of the photo.
UPDATE: I now believe that the photo
was probably attached to the mount by the photogapher. I've now
found two more photos by JK Munro. (See below.) They are
a better fit for their mounts than the photo above, but there are
similarities in the way that all three have been mounted.
The other question that strikes me about this photo is: "What was
outside the frame on the left, that everybody was looking at?"