That simple fact is almost all that survives in the public record. The site has been catalogued and assigned a monument number, which tells us that archaeologists considered it significant enough to note, but the details that would explain what was found there, how old it is, or what kind of metalworking took place, are not yet available.

Metalworking sites in Ireland range enormously in date and character, from prehistoric fulachtaí fia associated with bronze-working to early medieval smithing areas attached to monastic settlements, to post-medieval industrial workings. Without further detail specific to Mill Big, it is impossible to say which tradition this site belongs to, or whether surface features remain visible at all. The townland name itself is suggestive of a milling history in the area, which might point toward more recent industrial activity, but that remains speculation rather than established fact.

What can be said with confidence is that the Cork landscape contains far more evidence of early and medieval industry than is commonly appreciated, and sites like this one serve as quiet reminders that the working of iron and bronze was not confined to major centres but occurred at a local, often very modest scale across the countryside.