set ▁was ▁among ▁the ▁most ▁prominent ▁magn ates ▁in ▁the ▁greater ▁region ▁because ▁A ong hus ▁Ó g ▁of ▁Is lay ▁mentions ▁him ▁in ▁a ▁ 1 3 0 1 ▁letter ▁to ▁Edward ▁I ▁as ▁his ▁compat ri ot , ▁the ▁pair ▁" await ing ▁the ▁royal ▁commands ." ▁Mac Donald ' s ▁personal ▁loyal ty ▁in ▁practice ▁to ▁the ▁English ▁king ▁is ▁uncertain , ▁perhaps ▁comp lic ating ▁the ▁matter , ▁but ▁By set ' s ▁is ▁much ▁more ▁clearly ▁established , ▁because ▁he ▁is ▁recorded ▁a ▁number ▁of ▁times , ▁from ▁the ▁late ▁ 1 2 9 0 s , ▁in ▁the ▁Ang lo - N orm an ▁documents , ▁being ▁commanded ▁to ▁fight ▁against ▁the ▁English ▁king ' s ▁enemies ▁in ▁Scotland , ▁most ▁not ably ▁Robert ▁Bruce , ▁the ▁tre as ury ▁( C rown ) ▁pay ing ▁By set ' s ▁exp enses ▁for ▁must ering ▁his ▁forces ▁and ▁equ ipping ▁fle ets ▁to ▁go ▁against ▁the ▁Sc ots , ▁and ▁also ▁sending ▁supplies . ▁ ▁When ▁Edward ▁Bruce ▁inv aded ▁Ireland ▁in ▁ 1 3 1 5 , ▁Hugh ▁By set ▁and ▁the ▁heads ▁of ▁several ▁other ▁families , ▁Norman ▁and ▁G ael ic , ▁joined ▁Sir ▁Thomas ▁de ▁Man dev ille ▁in ▁oppos ing ▁him . ▁In ▁fact ▁where ▁Bruce ▁land ed , ▁Old er f le et ▁Castle , ▁was ▁quite ▁possibly ▁owned ▁by ▁the ▁B iss ett ▁family , ▁but ▁no ▁account ▁is ▁preserved ▁of ▁what ▁if ▁anything ▁this ▁may , ▁if ▁true ,