Handwritten diary with daily entries relating to activity at Stan McCosker's gold mine, 50 miles (80km) south of Rabaul. Sections towards the back of the journal contain lists of labourers and what appear to be accounts of payments made to them. There are also lists of tools and supplies. The journal encloses an unattached letter from 'Pop' to 'Bin', dated 31 December 1955 and 3 January 1956.

Personal correspondence both incoming and outgoing, mostly relating to Anne McCosker's research on the history of Australians in the colonial territory of New Guinea and her book Masked Eden.

Letters to Anne McCosker grouped together by her because they contain information used in the writing of Masked Eden. The folder also contains a letter dated 29 May 1955 addressed to Mr Thomas from G. Thomas.

Two ledgers detailing expenses, incomes and assets of the Matala Plantation from July 1954 to June 1955.

Correspondence, a statement of claim and associated documents and a copy of a judgement in the Supreme Court of the Territory of Papua New Guinea in the case of Stanley McCosker and Henry Walford King (plaintiffs) and Gustav Thomas Kuster (defendant). The Court ruled in favour of the plaintiffs and an application by the defendant Kuster for leave to appeal to the High Court of Australia was refused.

Final order dated 22 June 1953, re-establishing ownership of the Matala plantation to Herbert Walford King and Stanley McCosker under the New Guinea Land Titles Restoration Ordinance 1951-1952; and a map of the islands of the Hermit Group, supplied to H. Walford King in September 1956.

Handwritten draft of a talk delievered by Marjorie McCosker to the Business Professional Women's Club (Brisbane).

Letters from Marjorie McCosker, mostly to Francie. Folder also contains a travel coupon for Mrs S. McCosker for travel from Brisbane to Rabaul, date 17 July 1950.

Scrapbook of articles by Stan McCosker as printed in The Bulletin. The articles contain descriptions and accounts of life in New Britain. At the back of the scrapbook there are four loose newspaper cuttings from the 1960s and a typed article, 'The Epistle of Father Jerome to the Kiaps'.

Three photographs taken at a 1949 ceremony in Rabaul for awarding of war medals. Stan McCosker is identified in one of the photographs.