Corn Mill, Roe Valley Country Park, Largy, Limavady, Co Londonderry

Corn Mill

A picturesque ruin of significant historical importance stands on the steep riverside rocks of the River Roe, some 35 metres downstream of Largy Bridge in the Roe Valley Country Park near Limavady. This two-storey stone mill building with brick repairs may have originated as a Norman mill, potentially dating to the 14th century or earlier, and could represent the only surviving Norman-period building in the Limavady area if this attribution is confirmed. The mill is of considerable interest for its place within the complex history of milling on the River Roe.

The building is constructed of stone and built into the precipitous side rocks of the river. Ground level on the south-east side, away from the river, sits at what is now first-floor level. No wall survives above ground on this side. The south-west gable closes against rocks rising the full height of the building, with only a narrow track squeezing between them at first-floor level. Two window openings are positioned high on this gable, and from their base the entire structure has been rebuilt in brick. The north-west elevation faces the river at a 45-degree angle. Five openings pierce this facade: a ground-floor door at the south-west end with five stone steps descending to the lower riverside level; an outfall of the former millrace at mid-level; two almost-square brick-trimmed openings at first floor; and a third small opening, possibly once supporting a projecting pulley. The south-east gable mirrors the north-west design, with two large windows at high level in a brick-rebuilt portion and, at ground level, two smaller brick-trimmed windows each with stone lintels and brick relieving arches. The structure rises almost to its former full height, though it falls short of the brick line on the gables.

Historical records suggest this was one of two Norman mills of the Roe mentioned in an inquisition of 1333 at the death of Richard de Burgo, the Red Earl of Ulster, an attribution apparently supported by recent archaeological investigation. The building is clearly marked on the 1831 Ordnance Survey Map, though not identified as a mill. A mill race can be traced crossing the Largy bleach green above and south of the site, fed from the lade serving the adjacent weaving shed museum. By 1830, however, this race had been diverted away from the mill towards an aqueduct over the Roe at Largy.

The mill was probably incorporated into the complex of buildings associated with the bleach green established in 1766 by Lesley Alexander, which closed in 1831—explaining its unmarked status on the 1831 map. The 1848 Ordnance Survey Map labels the building "Old beetling mill," indicating it was reused as part of the linen manufactory founded in 1833. According to the Ordnance Survey Memoirs of 1834–5, this facility prepared linen yarn for distribution to weavers and occupied three of the twelve buildings shown on the 1830 map in Largy. The industry subsequently expanded into most of the surrounding structures before closing once more before the 1848 survey. Beetling, a finishing process for linen using repeated wooden hammers to impart shine, may have necessitated the brick rebuilding evident in the structure. The mill race ceased to be recorded on the 1848 map and is confirmed absent on the large-scale 1907 Ordnance Survey Map, which shows it terminating abruptly at the green's edge. The building is indicated as roofless on the 1907 map, suggesting dereliction from the second half of the 19th century onwards.

The building now stands too derelict to qualify for listing protection, though if its Norman origins are confirmed, it would merit scheduling as a monument and represent an exceptional survival in the regional archaeological record.