for some years before the war, himself dating his poetic beginnings to a stay at Broxton by the Hill when he was ten years old. The poetry of William Butler Yeats was a significant influence for Owen, but Yeats did not reciprocate Owen's admiration, excluding him from The Oxford Book of Modern Verse, a decision Yeats later defended, saying Owen was "all blood, dirt, and sucked sugar stick" and "unworthy of the poet's corner of a country newspaper". Yeats elaborated: "In all the great tragedies, tragedy is a joy to the man who dies ... If war is necessary in our time and place, it is best to forget its suffering as we do the discomfort of fever ..." The Romantic poets Keats and Shelley influenced much of his early writing and poetry. His great friend, the poet Siegfried Sassoon, later had a profound effect on his poetic voice, and Owen's most famous poems ("Dulce et Decorum est" and "Anthem for Doomed Youth") show direct results of Sassoon's influence. Manuscript copies of the poems survive, annotated in Sassoon's handwriting. Owen's poetry would eventually be more widely acclaimed than that of his mentor. While his use of pararhyme with heavy reliance on assonance was innovative, he was not the only poet at the time to use these particular techniques. He was, however, one of the first to experiment with it extensively. His poetry itself underwent significant changes in 1917. As a part of his therapy at Craiglockhart, Owen's doctor, Arthur Brock, encouraged Owen to translate his experiences, specifically the experiences he relived in his dreams, into poetry. Sassoon, who was becoming influenced by Freudian psychoanalysis, aided him here, showing Owen through example what poetry could do. Sassoon's use of satire influenced Owen, who tried his hand at writing "in Sassoon's style". Further, the content of Owen's verse was undeniably changed by his work with Sassoon. Sassoon's emphasis on realism and "writing from experience" was contrary to Owen's hitherto romantic-influenced style, as seen in his earlier sonnets. Owen was to take both Sassoon's gritty realism and his own romantic notions and create a poetic synthesis that was both potent and sympathetic, as summarised by his famous phrase "the pity of war". In this way, Owen's poetry is quite distinctive, and he is, by many, considered a greater poet than Sassoon. Nonetheless, Sassoon contributed to Owen's popularity by his strong promotion of his