In A Natural Perspective, distinguished critic Northrop Frye maintains that Shakespeare's comedy is widely misunderstood and underestimated, and that the four romances - Pericles, Cymbeline, The Winter's Tale, and The Tempest - are the inevitable culmination of the poet's career. Rather than comment only on individual plays, Frye treats the comedies as a group unified by recurrent structures, devices, and images: the storm at sea, the identical twins, the heroine disguised as a boy, the retreat into the forest, the heroine with a mysterious father.