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.

Documents relating to the eruption of volcanoes on Vulcan Island and Matupi, near Rabaul, in 1937. Documents include the 4 June 1937 issue of The Rabaul Times, three letters from around that time, a typed account of the events, and two published articles.

Letters from Stan to Marjorie McCosker in 1941 after she was evacuated from New Guinea to Australia, a letter from Stan McCosker to Walford King, and a letter from Marjorie to Francie King. The file also contains instructions dated 30 May 1940 from the Commanding Officer of the New Guinea Volunteer Rifles listing the personnel to escort enemy internees from Rabaul to Sydney. Stan McCosker is named as one of the seven members of the escort.

Photographic prints, postcards and some photographic negatives relating to the history of European-Australians involved with the plantation economy of Australian New Guinea. The series include images of Anne McCosker's family and their expatriate associates, local people participating in ceremonial performances, engaged in plantation labour or posing in portrait or group shots, and views of various locations in New Britain, New Ireland and other northern islands of New Guinea where the McCosker family was based. The majority of the photographs were taken in the 1920s, 1930s and the postwar 1940s, and many are captioned. Some were published in Anne McCosker's book, Masked Eden.

There are approximately 1243 b&w photographs, 53 b&w photo postcards and 12 negatives in this series.

Photographic prints of people, plantation life and scenery in the Australian Territory of New Guinea. Locations include Ningau, Witu and Rabaul. Many of the photographs show local people and European-Australians.

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.

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.

Photographic prints of people, plantation life and scenery in the Australian Territory of New Guinea. Locations include Matala Plantation, Kolopo and Rugenhafen. Some of the photographs feature members of the McCosker family and their associates. The album also contains a sequence of photographic negatives attributed to Walford King which show Chinese and Japanese fishing boats and cargo ships.

Notebooks containing handwritten drafts of poems published in Camp Fires.

Notebooks containing handwritten drafts of poems published in Potter's Clay.