=Prometheus= too is seldom seen, and chiefly on B.F. vases. In one case he receives a libation from Hera,[905] and there are two or three representations of his liberation by Herakles.[906] On a Cyrenaic cup he is grouped with Atlas, the vulture pecking at his breast, while the other groans under the burthen of the heavens.[907] =Atlas= is found almost exclusively with Herakles in connection with his visit to the Garden of the Hesperides. Either he is actually present in the Garden[908] or is confronted with the hero, who in some cases bears his burden for him while he obtains the apples.[909] He is also seen in company with a Sphinx.[910] * * * * * We now come to discuss a few subordinate deities or semi-divine personages who do not fall into any of the preceding categories. =Asklepios=, chiefly a figure of later art, is exceedingly rare on vases. There is, in fact, only one on which he can certainly be identified. This is a late R.F. vase at Athens, on which he is seen reclining on a couch feeding a serpent and accompanied by Hygieia.[911] Nor does the latter occur elsewhere, though her name, as already noted (p. 43), is sometimes given to one of the personified figures attending on Aphrodite.[912] =Eileithyia=, the goddess of childbirth, generally appears, in duplicated form, assisting Zeus at the birth of Athena,[913] or Leto at that of Apollo and Artemis.[914] She is closely related to Artemis, and a representation of a goddess who has been identified as Artemis-Eileithyia may be seen on an early Boeotian vase with reliefs at Athens.[915] =Iris=, the messenger of the gods, is usually distinguished from Nike by her caduceus or herald’s staff, and from Hebe by her wings. She is often depicted as a single figure,[916] or pouring a libation to Hera, Athena, or other deities.[917] She is associated more especially with Hera, as Hermes is with Zeus, and attends on the former in several scenes of assemblages of the gods.[918] In company with Hera she is attacked by a troop of Seileni and defended by Herakles,[919] and on another vase she is similarly surprised by a troop of Centaurs.[920] She assists at the creation of Pandora,[921] at the Judgment of Paris,[922] and at the wedding of Peleus and Thetis,[923] and also appears in the Garden of the Hesperides.[924] She is also seen with Paris carrying off Helen[925]; and with Menelaos fetching her back[926]; and in another scene, apparently drawn from a Homeric source (_Il._ viii. 397 ff.), where she dissuades Athena and Hera from taking sides in the war, at the behest of Zeus.[927] She conveys the infant Herakles to the Centaur Cheiron,[928] and is also seen in company with a warrior.[929]