The most important works dealing with His Master’s Voice, the objective versions, with the Congressional at the head, admit that we did not learn everything; but the amount of space devoted to the achievements, with occasional footnote mentions of what remained unknown—those very proportions suggested that we had mastered the Labyrinth, with the exception of a few corridors—dead ends, no doubt, probably buried in rubble—whereas in fact we did not get as far as the entrance.