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In page Roger Casement:

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A very brief expert opinion in 1959 by a Home Office employee failed to identify Casement as the author of the diaries.[citation needed] This opinion is almost unknown and does not appear in the Casement literature. As late as July 2015 the UK National Archives ambiguously described the Black Diaries as "attributed to Roger Casement", while at the same time unambiguously declaring their satisfaction with the result of the private Giles Report.[5]