It appears on the Friends of Medieval Dublin Map, published in 1978, a scholarly effort to reconstruct the layout of the medieval city from surviving documentary and archaeological evidence. The notation is spare and unassuming, the kind of detail that rewards a careful eye rather than announcing itself.

A millpond was the reservoir that fed water to a mill, holding enough of a head to drive the wheel consistently even when the natural watercourse ran low. Medieval Dublin depended heavily on such infrastructure, and mills were among the most economically significant buildings a settlement could possess, grinding grain for bread, fulling cloth, and later serving a range of industrial purposes. The south city had its own network of watercourses, some of them now culverted or entirely lost, and it is along one of these forgotten channels that this particular feature would have sat. The 1978 map was produced at a moment when interest in medieval Dublin's physical form was growing rapidly, partly in response to the threats posed by urban redevelopment, and it brought together cartographic, historical, and archaeological sources to pin down sites that had otherwise slipped from public awareness.

The millpond itself is no longer visible, and the surface of the city gives little away at this location. What survives is essentially cartographic, a point on the 1978 map that marks where water was once managed and impounded for industrial use. For anyone interested in the medieval topography of Dublin, the Friends of Medieval Dublin Map remains one of the more useful starting points, and tracking down the institutions or libraries that hold copies is a reasonable first step. The area repays walking with the map in hand, paying attention to subtle dips in ground level or the alignments of older laneways, the kinds of traces that sometimes signal a watercourse running underneath.