The communist take-over of South Vietnam in 1975 presents a certain resemblance to what happened two hundred years before, when the Trinh lords in the North overran the Nguyen's polity in the South by 1775, seizing the territories that had been separate from their control for over two centuries. The similitude of the two situations did seem highly symbolic to the Institute of Historical Studies in Hanoi, which on the pretext of publishing a complete collection of the eighteenth-century scholar Le Quy Don's works, reprinted a former translation of his “Miscellaneous chronicles of the government of the frontiers” as the first volume of this collection. This work was originally composed in 1776, after its author had been ordered south, as a member of the Trinh lords’ bureaucracy, to help restore civil government in the “recovered” areas, and facilitate their reincorporation into the north-centred political system. In its detailed description of the different aspects of southern administration, economy and society, it is tantamount to a survey of the affairs of what the author considered as an irrevocably defeated Vietnamese enemy government. This account of the southern regions at that very moment of national reunification seems also, to some extent, appropriate for the justification of the Tightness of the ideology of a North Vietnam that has just then triumphed over its adversaries.