In the second place, metaphor. The peculiarity of a language which is desirous of saying all yet concealing all is that it is rich in figures. Metaphor is an enigma, wherein the thief who is plotting a stroke, the prisoner who is arranging an escape, take refuge. No idiom is more metaphorical than slang: dévisser le coco (to unscrew the nut), to twist the neck; tortiller (to wriggle), to eat; être gerbé , to be tried; a rat , a bread thief; il lansquine , it rains, a striking, ancient figure which partly bears its date about it, which assimilates long oblique lines of rain, with the dense and slanting pikes of the lancers, and which compresses into a single word the popular expression: it rains halberds. Sometimes, in proportion as slang progresses from the first epoch to the second, words pass from the primitive and savage sense to the metaphorical sense. The devil ceases to be le rabouin