Part 44 of a series reassessing the documentary record behind the 1933 Magenta narrative. TL;DR The 15 March 1955 guide is a field-investigation compendium. It organizes reporting, witness interviews, checks against known phenomena, physical evidence and public statements. Its “solved” category needs qualification. ATIC wanted unknowns reduced to a bare minimum and allowed definite, probable or possible explanations; the same documents explicitly permit cases to remain unsolved. The squadron’...