THIS PARISH, containing the Burgh of Barony of its own name and the contiguous village of Prinlaws,..... Prinlaws, immediately to the west of Leslie, the property of John Fergus, Esq., contains extensive flax spinning, power-loom weaving, and bleaching establishments, partly driven by water and partly by steam-power. These are the most extensive works of the kind in the county- the various mills and buildings, with the numerous dwelling-houses for the work people, constitute, in themselves, a town of considerable size and importance.
from: 1861 PAROCHIAL DIRECTORY FOR FIFE AND KINROSS on Fife FHS site
there are some pictures available online by googling.
Diddy