Local historian Rev. P. Power suggested in 1952 that traces of an early castle’s foundations might once have existed here, though the exact location remains frustratingly elusive. Power’s theory possibly referred to a mound recorded in archaeological surveys as WA037-019001, but without definitive evidence, the castle’s precise whereabouts, if it ever stood at all, have been lost to time.

The mention of Garryduff Castle appears in Power’s seminal work on Decies place names, a region that encompasses much of western Waterford. His careful documentation of local toponymy and historical sites has proven invaluable for understanding the area’s medieval past, even when the physical evidence has long since vanished. The possibility of a castle at Garryduff fits well with the broader pattern of Norman settlement in Waterford during the 12th and 13th centuries, when defensive structures dotted the landscape as new lords established their authority.

Today, visitors to Garryduff will find no obvious castle ruins to explore, yet the enigma adds to the area’s charm. The mound that Power may have identified as castle foundations serves as a reminder that Ireland’s historical landscape often hides its secrets beneath ordinary fields and hedgerows. Whether this earthwork truly marks the site of a medieval fortification or represents something else entirely remains an open question, one that continues to intrigue local historians and archaeologists alike.