Bishop Patrick Hepburn ( 1538 -- 73 ) installed wide - mouth gun - loops to boost the castle defences and enlarges some windows .
Bishop Patrick Hepburn ( 1538 -- 73 ) is the last Roman Catholic bishop at Spynie .
Bishop Patrick Hepburn ( 1538 -- 73 ) , the last Roman Catholic bishop at Spynie , installed wide - mouth gun - loops to boost the castle defences and enlarges some windows .