The feature they labelled a corn kiln, a low stone structure used to dry harvested grain before milling, typically by drawing heat through a perforated floor above a furnace chamber, appears on both editions of the OS six-inch map, suggesting it remained a recognisable feature of the landscape for well over a century.

The 1835 map shows a subcircular enclosure roughly 35 metres in diameter, with the kiln positioned at its south-western edge. By the time the revised edition was produced in 1944, the enclosure had grown in the cartographers' depiction to around 60 metres north to south and 50 metres east to west, rendered with hachuring to suggest an earthwork or quarried depression, and the kiln is again noted at its western margin. The quarry association is plausible: corn-drying kilns were sometimes dug into hillsides or hollows to make use of natural shelter and to contain the heat more efficiently. Roughly 100 metres to the north-north-east, a corn mill once operated, and the kiln was likely a working part of that same agricultural complex, preparing grain for the grindstones nearby. Whether the enclosure itself was the quarry that provided stone for the mill buildings, or a separate feature entirely, is not firmly established.