Leuchars and the advent of technology.
These two photos show the same street scene in Leuchars. They aren't dated, but the railway first came in 1848.
What does separate these two images is the advance of technology. The older one on the left shows a dirt road, and the buildings either side of Main Street are hotels or inns, offering stabling for horses.
By the time of the second photo, there are street lights, telegraph poles, and the stables have given way to garages.