Nineteen metres across but barely half a metre high, this Bronze Age mound barrow, a burial monument typically raised over the remains of the dead, gives almost nothing away from the surface. What it concealed for millennia only became apparent in the mid-1920s, when a cist was discovered within it. A cist is a small stone-lined grave box, built to hold a body, and in this case it contained an inhumation, meaning the burial of an intact or largely intact corpse rather than cremated remains.

The find was recorded by Liam Price, whose 1934 account remains the principal source for the site. Price was a Dublin-born judge and dedicated antiquarian who spent much of his career documenting the archaeology and place-names of County Wicklow, and his fieldwork preserved details of many monuments that might otherwise have gone unrecorded. The Tuckmill barrow does not stand alone in the landscape. About 150 metres to the north lies the site of a standing stone, now apparently gone, suggesting that this corner of Wicklow once held a modest concentration of prehistoric monuments. Such groupings are common enough across Ireland, where barrows, standing stones, and other markers of the Bronze Age dead and their rituals tend to cluster in ways that hint at landscapes shaped by ceremony and memory over long periods of time.