The correspondence includes comments on the book following its publication and Langdon's subsequent research into related matters discussed in the book. The correspondence is in three parts: (1) General correspondence, 1975-1980 (2) Correspondence, 1978-1987, re the conservation of two iron cannon retrieved from Amanu Atoll, French Polynesia, in 1969. (3) General correspondence, 1981-1987. A calendar for each section of correspondence precedes the correspondence itself on the microfilm. Sections (1) and (3) are filmed in alphabetical order by correspondent and then in chronological order; section (2) is microfilmed in chronological order. The contents of each reel of microfilm is as follows: Reel 1 Section (1), A - Kish; 2 Section (1), Ko. - Z; Section (2) to 1986; 3 Section (2), 1987; Section (3).