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In page Sarah Churchill, Duchess of Marlborough:

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Anne's next letter to the Duchess referred sarcastically to the "command" the Duchess had given her to be silent. As a result the Duchess, who rarely admitted that she was in the wrong, apologised for her rudeness, but her apology had little effect. Anne wrote to the Duke of Marlborough, encouraging him not to let her rift with the Duchess become public knowledge, but he could not prevent his wife's indiscretion.[citation needed]