At first sight—in the way in which they looked at one another and smiled, in the insistent stare of the one with the dull cheeks—I had grasped that they were not. Besides, my grandmother had always watched over me with a delicacy too timorous for me not to believe that the sum total of the things one ought not to do was indivisible or that girls who were lacking in respect for their elders would suddenly be stopped short by scruples when there were pleasures at stake more tempting than that of jumping over an octogenarian.