National Geographic : 1955 Nov
644 Within the Bent Pyramid: Looking from Floor to Ceiling of the Lower Chamber King Snefru's ritual-minded architects built two entrances and two burial vaults. This room, cluttered with modern scaffolding, appears to have been the false tomb. The presumed sepulcher lies at the end of a labyrinth of passages guarded with pitfalls intended to drop any unwary intruder to his death. Notwithstanding, thieves found a way in. The first scientific examination (1839) revealed no treasure (pages 615, 638).