following alan's death, the constableship passed to roger de quincy, husband of alan's eldest surviving daughter, helen. alan's irish lands were not inherited by his daughters. forty years after his death, these lands are recorded in the hands of the bissets, although precisely how this came about is uncertain. the succession of the irish and gallovidian lands of alan's brother, thomas, is also uncertain. in fact, thomas' lands should have passed to his son, patrick, had the latter not died on the eve of his inheritance (under suspicious circumstances, apparently at the hands of the bissets).