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.

Literary notes and drafts of Anne McCosker's poems and stories, personal correspondence, research papers and correspondence relating to the history of Australian New Guinea before and after World War Two, World War One letters from Lieutenant F.W.S. (Fred) Martin, and photographs relating to Anne McCosker's family history in Australian New Guinea. Many of the letters, research documents and photographs relating to New Guinea were used as source material for Anne McCosker's book Masked Eden: A History of the Australians in New Guinea.