But now, further reticence was both useless and undesirable; he determined to make a clean breast of the whole story to his father.
Grant Allen. The Woman Who Did.
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you are taking a very great responsibility and putting yourself in a very false position by not making an absolutely clean breast of all that you know.
Arthur Conan Doyle. Sherlock Holmes: The Hound of the Baskervilles (1902)