Gilbert, Earl of Cassillis obtained control of Glenluce during the reign of Mary, Queen of Scots. The Earl persuaded one of the monks of the abbey to counterfeit the necessary signatures to a deed conveying the lands of the abbey to him and his heirs. To ensure that the forgery was not discovered he employed a man to murder the monk and then persuaded his uncle, the laird of Bargany to hang his paid assassin on a trumped up charge of theft. The success of these actions encouraged him to obtain the lands of Crossraguel Abbey through the torturing of Allan Stewart, the commendator at his castle of Dunure.
* Now in England, but at the time of its foundation, part of the Scottish kingdom of David I.
** Filiation from Mellifont Abbey in Ireland, founded 1142.
*** If this existed, it was shortly afterwards replaced by a Premonstratensian establishment.
**** In the line of filiation from Melrose (above).