That designation, spare and industrial-sounding against the backdrop of one of Ireland's most studied island landscapes, raises an immediate question: what was being made here, and by whom?

The Aran Islands have a longer industrial history than their image as a place of ancient stone forts and traditional currach fishing might suggest. Kelp harvesting and processing was a significant industry across the western islands from the eighteenth century onward, with seaweed burned in stone kilns to produce ash used in the manufacture of glass and soap. Later, iodine extraction drew further commercial interest to coastal communities. A site classified as a factory in this context could plausibly relate to any of these industries, though without more detailed records it is not possible to say with confidence what this particular structure produced, who operated it, or when it fell out of use. The name Eochaill itself is Old Irish, sometimes interpreted as relating to a yew wood, which points to a place with a long history of habitation well before any industrial episode.