Mary was a member of the House of Dunkeld by birth and Countess of Boulogne by marriage.
The girls spent their early years at the monastery, where they also received part of their education.
Some time before 1093, they went to Wilton Abbey, which also had a reputation as a centre of learning, to finish their education.
Matilda wanted her to marry as well, so Henry I arranged a match with Eustace III, Count of Boulogne.
[citation needed] The couple had a daughter, Matilda, who succeeded Eustace and later became Queen of England.