Heather James argues that Shakespeare"s use of Virgil, Ovid and other classical sources demonstrates the appropriation of classical authority in the interests of developing a national myth. She goes on to distinguish Shakespeare"s deployment of the myth--notably in Troilus and Cressida, Antony and Cleopatra, Cymbeline, and The Tempest--from "official" Tudor and Stuart ideology, and to show how Shakespeare participates in the larger cultural project of finding historical legitimacy for Britain as a realm asserting its status as an empire.