Complete collection digitized and available online
Logbook of incoming and outgoing reports 1928 November - 1931 May
1920 February 2 - December 31
1922 January 5 - 1923 July 14
1923 July 16 - 1926 January 21
1926 January 7 - 1929 July 17
Logbook of incoming and outgoing telegrams and letters 1937 - 1939 October