"Since the present Bibliography was first written very important additions have been made to our knowledge of this period and that which follows it by English and American historians who have acknowledged the leadership of Sir Lewis Namier and so far taken his methods as their example that they are commonly spoken of as the Namier school. The movement began in 1929 with the publication of his two-volume work The Structure of Politics at the Accession of George III. This was a work of rare originality and critical power, in which he transformed the accepted views of electoral practices and parliamentary life by exploiting all the available materials especially from a biographical point of view."