Focussed exhaustively on the phenomena of August-November 1954 in France, and with a final section on those of October- November 1957 in the U.S., this accumulates, investigates and attempts to evaluate the form and perhaps meanings of the unidentified flying objects then visible. Through a round-up of reports, sightings, observations, this follows the course of the apparitions all over Europe and plots the line of appearances in aligning a network that would seem to indicate a design; it weighs verifiable facts against possible suppositions; it underlines the implications of a ""contact that would shatter the foundations of our culture""; and it presents its case as a clue to the arrangement and method of these visitations as a whole. For those who have followed Keyhoe and Ruppelt in their assessments, this will provide additional arguments for belief in UFO.