THAT was no time or place for any girl of twenty to be wandering unprotected. Rosemary McClean knew it; the old woman, of the sweeper caste, that is no caste at all, -the hag with the flat breasts and wrinkled skin, who followed her dogwise, and was no more protection than a toothless dog, -knew it well, and growled about it in incessant undertones that met with neither comment nor respons