in the late middle ages the styles "rex scottorum" ("king of the scots") and "rex scotiae" ("king of scotland") were used interchangeably. similarly, the monarchs of england could be referred to as the "king of the english" as indeed edward ii of england was in the declaration of arbroath (1320). king of the scots was used in "the declaration of the clergy in favour of robert the bruce" (1334), as it was in the charter by which edward balliol ceded the southern counties of scotland to england. however, in many other documents king of scotland was the preferred style, including "the letter of the magnates of scotland to the king of france" (1308), "the settlement of succession on robert the bruce" (1315), the treaty of corbeuil (1326), the treaty of edinburgh-northampton (1328), the papal bull authorising the anointing of scottish kings (1329) and the treaty of berwick (1357). this remained the case until the last three monarchs of scotland, william ii, mary ii and anne, who became queen of great britain following the acts of union 1707.