Folder C.155. "Type F Inequalities". This is a substantial file of material, punched, paginated and with a summary of contents, of the same format and organisation as the stiff-backed binders but kept instead as loose papers in a folder. The material runs December 1953 to December 1954 and covers various attempts using Cochran's methods and other programmes to obtain good Fouriers for finback whale.

Folders C.156-160. Five folders of contour maps and printouts for Fouriers of finback, 1954, 1955.