Published 1961 by His Majesty’s Stationery Office. First produced and printed in 1937 for official purposes only.
The Preface states …”An official history written from the official archives… The history is principally based on official material contained in the archives of the departments concerned with the direction of the blockade - first and foremost the Foreign Office, and then, though in a noticeably less degree, the Admiralty”.
Considered generally therefore to be part of the series History of the Great War based on Official Documents, mostly published by His Majesty’s Stationery Office.
Digitised by Google Books from the collection of the University of Michigan https://books.google.com/books?id=yRjFAAAAMAAJ