Lot Essay
The Nereid, Thetis, was sought in marriage by both Zeus and Poseidon, until hearing that she would give birth to a son more powerful than his father. Zeus chose then to marry Thetis to the mortal Peleus, King of Thessaly, with whom she bore Achilles. Cf. R. A. Higgins, Greek Terracottas, London, 1967, pp. xxxvi and 104, pl. 47B, no. 47B for a Corinthian terracotta of Thetis riding a sea-monster and carrying Achilles' helmet.