A true representation of the plan formed at Albany, for uniting all the British northern colonies, in order to their common safety and defence : containing abstracts, of the authorities given by the several governments to their commissioners; and of several letters from the secretaries of state, and lord commissioners for trade and plantations, concerning such an union: together with a representation of the state of the English and French colonies in North-America; and the said plan of union, with the doings of the commissioners thereon; and some remarks on the whole.