This latter work was for Paul Wittgenstein, the pianist who, having lost his right arm in World War I, also commissioned left hand works from such luminaries as Prokofiev, Ravel, Strauss, Hindemith and Korngold. ???Not deep,??? Britten said of the work, ???but quite pretty.??? But why so little solo piano music, even though his friend Richter would have loved him to write some more?