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In page Edmund Blunden:

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Blunden survived nearly two years in the front line without physical injury (despite being gassed in October 1917[3]) but, for the rest of his life, he bore mental scars from his experiences.[4] With characteristic self-deprecation he attributed his survival to his diminutive size, which made "an inconspicuous target".[5] His own account of his experiences was published in 1928, as Undertones of War.