The question of Australian control over the Antarctic Continent lying between Enderby Land and Queen Victoria Land was discussed at the Imperial Conference of 1926.

The Mawson Expedition of 1929-30 was dispatched:
(a) To raise the flag and assert British Sovreignty in this area     
(b) To gather scientific data.

In 1929 the Department of Interior produced an outline map for the use of the expedition.  This is the base map for 1928. 

On 7th February 1933 the Australian Antarctic Territory was formally proclaimed and the Commonwealth Government immediately decided to commence preparation of a new map.  The work was commenced by Mr. E.P. Bayliss of the Department of the Interior who was joined by Dr. J.S. Cumpston of the Department of External Affairs in 1936.  The map with an accompanying handbook was finally published in 1939.

The collection therefor resolves itself into two main elements:     
(a) Maps used at Imperial Conferences in the discussion of boundaries
(b) Data and working papers collected for use in connection with the preparation of the 1939 map including maps originating from the 1929-1931 expedition.

The maps were filed in the departmental library and transferred from there. Most of the relevant correspondence is on a single file relating to the
preparation of the map of Antarctica bearing the number '9' which is still  [1964?] in the custody of the Department of External Affairs. 
Further relevant cartographic data is held by Mawson Antarctic Institute in Adelaide and the Naval Hydrographer at Garden Island.