This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
Sir John (Jack) Harold Plumb FBA (20 August 1911 – 21 October 2001) was a British historian, known for his books on British 18th-century history.
During the Second World War, Plumb worked in the codebreaking department of the Foreign Office at Bletchley Park, Hut 8 and Hut 4, later Block B. He headed a section working on a German Navy hand cipher, Reservehandverfahren.