Because none of Wordsworth's later poems has been so neglected as his sonnet cycle The River Duddon, the pleasant task remains of doing it critical justice. O. J. Campbell has used it as an illustration of Wordsworth's later symbolic art, and the geographical features of the landscape through which the Duddon flows have been adequately described. Furthermore, the English river is a happier symbol than the deer in The While Doe of Rylstone and has simpler, more natural virtues than the mystic Holy River which is the life-stream of pure religion in the Ecclesiastical Sonnets. Most of the Duddon poems, it is true, fall less sublimely upon the ear and have less nobility and perfection than the finest he composed before 1806. Even so, their level is consistently high, part of their attractiveness being a sometimes bleak austerity. In several ways too, as Wordsworth generously says in his “Postscript,” the sequence is related to Coleridge's project, The Brook, outlined in Biographia Literaria. More important, however, is the final development of an extended theme based upon water imagery, for after 1797 Wordsworth's profoundest insights are often associated with it. We have also Robert Arnold Aubin's comment that “the greatest river-poem of all is Wordsworth's River Duddon (1820)… . With its use of apostrophe, local pride, historical reflection, catalogue, moralizing, genre scenes, episode, early memories, prospect, ruin-piece, and Muse-driving ( On, loitering muse—the swift stream chides us—on!'), it is not wonderful that a reviewer perceived that the work belonged in the main stream of topographical poetry.”