The stone is modest in size, roughly half a metre tall and less than a metre wide, but it carries a carved skull and crossbones at the top, an impaled coat of arms at the bottom, and between them an inscription that counts out, with quiet exactness, that Katherine Holcroft was married for eleven years and thirty-four days before she died.

The inscription traces Katherine's position in two gentry families. She was the second daughter of Edward Ormsby of Tobervady in County Roscommon, and the wife of Charles Holcroft of Cloonigashel in County Mayo, himself the third son of Sir Henry Holcroft of Eastham in Essex. The impaled arms on the stone, a heraldic convention for displaying the combined coats of a husband and wife side by side on a single shield, mark this union visually as well as in text. The monument dates to the seventeenth century, but the church it is fixed to is considerably younger. St Mary's was built in the early nineteenth century on the site of a medieval parish church, and the plaque was most likely salvaged from the ruins of that earlier structure and set into the new wall when the rebuilding took place. The verse carved at the foot of the stone, "Weari'd of th' Earth to Heav'n blest Soul th' art gone, Angels rejoyce here wee our Losse bemoane," has the compressed, half-metrical quality of its era, more felt than polished.

The monument sits high on the external wall face, so visitors approaching the churchyard will spot it from outside before they reach the door. The skull and crossbones carving, a memento mori motif common in seventeenth-century funerary work as a reminder of mortality, is clearly visible, and the inscription, though worn, remains largely legible. The churchyard itself is an active burial ground, and the layering of periods here, medieval foundations, nineteenth-century masonry, a seventeenth-century plaque, gives the site an unusual density for what appears, at first glance, to be an ordinary rural church.