This appears to be the work of Fergalin in conjunction with Murchad Midi (died 715) the King of Uisnech of Clann Cholmáin and Murchad may have been Fergal's deputy ruler in the south.
Fergalin appears to be involved in this work alongside Murchad Midi (who died in 715) as the King of Uisnech from Clann Cholmáin. It is possible that Murchad served as Fergal's deputy ruler in the south.