Papers collected and organised for the purpose of writing the book Masked Eden. Papers include correspondence, newspaper cuttings, local news bulletins, typed manuscripts of stories, statements, copies of military records and some administrative records and photographs. Some correspondents in this subseries are also represented in Series B.

Photographic prints showing people, plantation life and scenery in the Australian Territory of New Guinea. Locations include Wara-Ta-Bar (New Ireland), Ningau, Matala Plantation and Witu. Many of the photographs feature local people wearing ceremonial dress, undertaking ceremonial performances and posing for the photographer. Most of the photographs were taken in the 1930s.

A licence to drive a motor vehicle, issued by the Territory of Papua New Guinea to Stanley McCosker; a certificate issued by the Federal Institute of Accountants to Marjorie Martin certifying her as a Provisional Associate of the Institute; a sheet bearing the imprints of two ink stamps: the stamp of the Deutsche Kolonialgesellschaft Abteiling Bismarck Archipel, and the stamp of the New Guinea Compagnie. The original ink stamps used can be found in Series E, File 1.

Documents collected and collated by Anne McCosker and used as source material for her book Masked Eden.

Papers of Anne McCosker's father, Stan McCosker, including correspondence, business records, court documents, maps, photographs and drafts of articles.

Three maps of New Britain. The earliest map, dated 1927, shows New Britain in relation to surrounding islands and the New Guinea mainland. It includes an index of properties and places, and shows plantations and trading stations. The other two maps were issued by the U.S. Army in 1943 and show sections of New Britain. An accompanying note by Anne McCosker states the maps were used by Stan McCosker during the war years.

Photographic prints of people, plantation life and scenery in the Australian Territory of New Guinea. Locations include Witu, Raulaurat Plantation, Kavieng (New Ireland), Ningau (Witu), Londip Plantation, and Samarai. Many of the photographs feature local people and European-Australians.

Correspondence of Anne McCosker's parents and their New Guinea associates, collected and used as source material for her book Masked Eden.

Photographic prints of plantation life, people and scenery in Australian New Guinea. Locations include Rabaul, Witu, Matala Plantation, Gumyitke Creek (New Britain), and Vunakambi Plantation. Many of the photographs feature Stan and Marjorie McCosker and local people employed as plantation labourers and house servants. The majority of the photographs were taken in the 1920s and 1930s. A small number were taken at Matala Plantation in 1948.

Letters from Walford King in 1940 during his war service in Palestine and a photograph of King in AIF uniform in Jerusalem in 1940. The folder also contains a letter dated 25 December 1924 from 'Joe' to Telong, identified as G.T. Heathcote.