The old corn mill at Esker in County Galway is one such structure, a remnant of the agricultural economy that shaped this part of the midlands for centuries, now quiet enough that detailed records about it remain, for the moment, largely inaccessible to the general public.

Esker itself is a place of some geological interest. The name derives from the Irish eiscir, referring to the long, winding ridges of gravel and sand deposited by meltwater rivers flowing beneath glaciers during the last ice age. These esker ridges ran east to west across Ireland and were used as routeways long before formal roads existed, including the great Esker Riada, which served as a traditional boundary between the northern and southern halves of the country. That a corn mill should be sited in this area is unsurprising. Mills required a reliable water source and reasonably good access routes for bringing grain in and taking flour out, and the settled agricultural communities of east Galway would have depended on local milling facilities well into the nineteenth century, when larger industrial operations gradually made smaller rural mills redundant.