The slab commemorates a man recorded as William Bosser, with an alias of Busher, a double name that hints at the kind of fluid identity, perhaps a family with both an anglicised and a vernacular form of their surname, that turns up frequently in late medieval Irish records.

The priory itself is a substantial medieval complex, and the Lady Chapel, a side chapel dedicated to the Virgin Mary and a common feature in Augustinian houses, would have been a place of particular devotion and prestige. To be interred beneath its floor, rather than in the nave or churchyard, suggests William Bosser occupied a position of some local standing in the early sixteenth century. The slab is noted by both Carrigan, writing in 1905, and by Cockerham and Harris in 2001, placing it within a longer tradition of scholarly attention to the priory's fabric and monuments.