It was the hour at which she liked Waikiki best, the hour just preceding dinner and the quick tropic darkness. The shadows cast by the tall cocoanut palms lengthened and deepened, the light of the falling sun flamed on Diamond Head and tinted with gold the rollers sweeping in from the coral reef. A few late swimmers, reluctant to depart, dotted those waters whose touch is like the caress of a lover. On the springboard of the nearest float a slim brown girl poised for one delectable instant. What a figure! Miss Minerva, well over fifty herself, felt a mild twinge of envy--youth, youth like an arrow, straight and sure and flying. Like an arrow the slender figure rose, then fell; the perfect dive, silent and clean.