This diary opens on 28 June 1914 the date of the assassination of the Archduke Francis Ferdinand and his wife and the last entry is dated 10 August 1919. It is on a daily basis up to the end of 1918. There are entries for 1919 but these are more brief and not on a daily basis. It is a record of the day to day operations and other significant events of the Great War by land sea and air. At the end are a number of statistical tables givng casualty figures British and German naval losses in personnel and ships merchant shipping losses details of the U-boat war a review of British Air Power German airship losses and British civilian and military casualty figures resulting from air raids and bombardments from the sea. Finally there is a very comprehensive index of 248 pages.