Chaucer shares on the literary stock marker have been rising during the past ten years, owing chiefly to the enthusiasm, literary gifts and scholarship of an Oxford don, Nevill Coghill, and secondarily to the British Broadcasting Corporation. The fluctuations of the literary market are familiar to everyone; sometimes there is a fierce flutter in a virtually unknown commodity (like the John Donne boom in the twenties); occasionally an almost dead commodity bursts in new life (as in the Trollope boom of the forties); Foreign Moderns (Sartre, de Beauvoir, Camus, Sagan) are eagerly pushed but are apt to collapse suddenly, wiping out those critics who have invested too heavily in them; in the USA the Deep South and Proletarian Anguish are solid, though all else fluctuates unpredictably.