But in 1720 they [Board of Trade] recognized the special urgency of the affairs of 'Carolina and Nova Scotia, the two Frontiers of the British Empire in America to the North and to the South.' The chief care of the French, they believed, was to make themselves strong 'at the two Heads of their Colonies, North and South.' In the next war the conquest of Nova Scotia from Quebec and Cape Breton might be expected. Even greater was the danger of Carolina, 'where our Bounds have never yet been Ascertained any other way, but by the Charters to the Lords Proprietors,' and where, recently, the negro slaves had conspired to massacre their masters. 84 [Note 84 c.o.]