If you don't know the treaty of Greenwich was a treaty between the kingdom of Scotland and the kingdom of England the peace treaty's main article said that a marriage between Mary queen of scots and prince Edward vl of England Mary was to be accompanied by and English gentlemen/lord until she moved to England when she was ten so when Edward dies on schedule she whould have been in England for two year how whould this have effected Mary queen of scots poltics and her rule in genrel