This particular barrow sits in pasture on the demesne lands of Derk House, and it left no impression on the Ordnance Survey maps that recorded so much of rural Ireland in meticulous detail. For well over a century, it was, cartographically speaking, simply not there.

The monument came to light not through excavation or archival research but through aerial photography. A survey flown over the Bruff area in 1986 picked out the site, logged as Bruff 75, and identified it as a ring-barrow, a type of low circular earthwork, typically defined by a central mound and a surrounding ditch or bank, used for burial during the prehistoric period. The broader cluster to which it belongs is remarkable in itself: fourteen barrows concentrated within the southern portion of Derk townland suggest this landscape was considered significant over a long stretch of prehistory, though the precise dates and the individuals commemorated here remain unknown. The nearest companion barrow lies only 175 metres to the west. Derk House, which once looked over all of this, stands 560 metres to the north.

The site is on private pasture land and not publicly accessible in any formal sense, so any interest in visiting should begin with establishing whether landowner permission is possible. Even then, there is little to see at ground level; the earthwork is so reduced that it does not register as anything obviously ancient underfoot. The cropmark, that faint circular trace in the grass or crops above the buried feature, showed up on aerial orthophotos taken between 2005 and 2012 and again on a Google Earth image from September 2020, meaning it is most likely to be visible in dry summer conditions when differential growth or soil moisture betrays the ring beneath. For those with an interest in aerial archaeology rather than on-the-ground monuments, the Bruff survey image labelled Bruff 75 remains the clearest record of what this quiet corner of Limerick contains.