Joe recited this couplet with such manifest pride and careful perspicuity, that I asked him if he had made it himself.
Charles Dickens. Great Expectations (1861)
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he obeyed his daughter, giving her credit for a certain amount of perspicuity and cleverness.
Arnold Bennett. The Grand Babylon Hôtel (1902)
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At once it was as though a wall had sprung up to hide from me a part of the life of Gilberte, as though an evil genius had spirited my friend far away. In a language that we know, we have substituted for the opacity of sounds, the perspicuity of ideas.