Relevant material includes correspondence registers covering Andrew Fisher’s terms as Prime Minister and High Commissioner. Microfilmed copies are available in Australia through the Australian Joint Copying Project.

Holdings include:

CO7
Colonial Office, Dominions, war of 1914–18. Register of out letters, 1914–19 (7116-7117).

CO616
Colonial Office, Dominions, war of 1914–18. Register of out letters, 1914–19 (6013-6089).

See the National Archives, United Kingdom website.