For the folding seats on its shore, the forms of the monsters in the stalls were painted upon the surface of those eyes in simple obedience to the laws of optics and according to their angle of incidence, as happens with those two sections of external reality to which, knowing that they do not possess any soul, however rudimentary, that can be considered as analogous to our own, we should think ourselves mad if we addressed a smile or a glance of recognition: namely, minerals and people to whom we have not been introduced. Beyond this boundary, withdrawing from the limit of their domain, the radiant daughters of the sea kept turning at every moment to smile up at the bearded tritons who clung to the anfractuosities of the cliff, or towards some aquatic demigod, whose head was a polished stone to which the tides had borne a smooth covering of seaweed, and his gaze a disc of rock crystal. They leaned towards these creatures, offering them sweetmeats; sometimes the flood parted to admit a fresh Nereid who, belated, smiling, apologetic, had just floated into blossom out of the shadowy depths; then, the act ended, having no further hope of hearing the melodious sounds of earth which had drawn them to the surface, plunging back all in a moment the several sisters vanished into the night.