In the townland of Currower east of the Abbey there is an Ogham stone standing 11 feet in height, one of only eight examples known in Co. Mayo.
An examination of markings in the Celtic Ogham script have been translated as "Mac Uí Riaghan". Local tradition says Mac Uí Riaghan was an important chieftain in Attymass & that the Ogham stone marks his grave. By Della Ginley