His 1867 poem, "Dover Beach," depicted a nightmarish world from which the old religious verities have receded. It is sometimes held up as an early, if not the first, example of the modern sensibility. In a famous preface to a selection of the poems of William Wordsworth, Arnold identified, a little ironically, as a "Wordsworthian." The influence of Wordsworth, both in ideas and in diction, is unmistakable in Arnold's best poetry. Arnold's poem, "Dover Beach" was included in Ray Bradbury's novel, "Fahrenheit 451," and is also featured prominently in the novel "Saturday" by Ian McEwan. It has also been quoted or alluded to in a variety of other contexts (see Dover Beach). Henry James wrote that Matthew Arnold's poetry will appeal to those who "like their pleasures rare" and who like to hear the poet "taking breath." In his poetry he derived not only the subject matter of his narrative poems from traditional or literary sources, and much of the romantic melancholy of his earlier poems from Senancour's "Obermann".