General Post Office
DMSCO Log Book Vol.9 6/1931-12/1932
DMSCO Log Book Vol.6 7/1928-7/1929
DMSCO Log Book Vol.7 7/1929-5/1930
DMSCO Log Book Vol.11 2/1934-1/1935
DMSCO Log Book Vol.15-16 1938
DMSCO Log Book Vol.14 1937
DMSCO Log Book Vol.22 1944
DMSCO Log Book Vol.23 1945
DMSCO Log Book Vol.25 1947
DMSCO Log Book Vol.26 1948
DMSCO Log Book Vol.29 1951
