Charles Pratt was a leading proponent of civil liberties in eighteenth-century England. He was trained in the law, and by 1757 had become Attorney General. He entered Parliament as an MP the following year, but resigned in 1762 when he was made Lord Chief Justice of Common Pleas. In 1763, Pratt was involved in the case of John Wilkes, who was prosecuted for libel. The case raised the question of the legality of general warrants for the search of houses, and Pratt became hugely popular by pronouncing such warrants illegal. He re-entered Parliament on being created Baron Camden in 1765, and was appointed Lord Chancellor a year later.
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National Portrait Gallery, London
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