the stronghold dunadd was laid siege in 682 , most likely by the british kingdom of alt clut in collaboration with the picts of fortriu and fife whose king was bridei son of beli ] back to top chapter 3 lios mr sister tamara assisting sister fea supervising patients at the lios mr monastery infirmary lauds [ morning prayer , at daybreak ] had just finished and many of the monks and sisters at the monastery on lios mr were at work .