Her graveslab, cut with Roman capitals and still legible when the historian William Carrigan examined it in 1905, reads: HERE LIETH THE BODY OF MARGRET WIFE TO WILLIAM BVTLER, GENT. AND DAUGHTER TO JOHN BRADSTREETT, WHO DIED YE THIRD DAY OF MAY, 1685. The slab is described as only slightly injured, which, given that it had already spent two centuries underfoot, suggests it was well made to begin with.

The church itself is a 13th-century structure, and by the time Margret Butler was laid to rest in 1685 it had been in use for roughly four hundred years. Carrigan placed the slab in what he called the third division of the north aisle, a detail that gives a sense of the church's interior organisation even if that arrangement has since shifted. The Butler name connects her, at least nominally, to one of the great Anglo-Norman dynasties of Kilkenny, though her husband William is identified only as a gentleman rather than by any grander title. Her father, John Bradstreett, appears only in the inscription itself. The slab's current whereabouts are less certain than Carrigan's description suggests; it may now be among a collection of slabs and architectural fragments stored in a 17th-century mortuary chapel built against the south wall of the nave, where displaced stonework from the church has been gathered over the years.