"With the publication of Namier's two major works on British eighteenth-century history, The Structure of Politics at the Accession of George III, and England in the Age of the American Revolution, the then accepted picture of the political world in the first half of George III's reign lay scattered in ruins. Schoolmasters, it has been said, hastily roped off the later eighteenth century and guided their charges through more simply charted periods. Nor was it they only who fled from chaos. Namier himself had provided only a few foundations and guidelines for the new historical reconstruction made necessary by the levelling of the old. At that time his intention of carrying his work further was immediately precluded by the non-availability of vital manuscript collections containing the papers of George Grenville, the Marquis of Rockingham and Edmund Burke."